sunxi: kconfig: Introduce CONFIG_TARGET_<BOARD>

This was done automatically with the following bits of scripting.

The Kconfig choice content was generated with this script snippet:
    for i in $(git grep -l CONFIG_ARCH_SUNXI configs/*) ; do
        TARGET=$(sed -n -e 's/CONFIG_SYS_EXTRA_OPTIONS="\([^,"]\+\).*/\1/p' $i);
        MACH=$(sed -n -e 's/.*CONFIG_\(MACH_SUN.I\)=./\1/p' $i)
        echo "config TARGET_$TARGET"
        echo "	bool \"$TARGET\""
        echo "	depends on $MACH"
        echo
    done

defconfigs were updated with a sed script (t):
    # Extract board from first entry of CONFIG_SYS_EXTRA_OPTIONS,
    /^CONFIG_SYS_EXTRA_OPTIONS/ {
        s/^\(CONFIG_SYS_EXTRA_OPTIONS="\)\([^,"]\+\),\?\(.*\)/\1\3\nCONFIG_TARGET_\2=y/;

        # Print and delete first line (CONFIG_SYS_EXTRA_OPTIONS), leaving
        # CONFIG_TARGET_<BOARD> in pattern space
        P;D;
    };

    # Move CONFIG_TARGET_<BOARD> to hold space
    /^CONFIG_TARGET/{h;n}

    # Print CONFIG_TARGET_<BOARD> after CONFIG_MACH_<SOC> in either SPL or
    # normal mode.
    /^CONFIG_MACH/{p;g;p;n};
    /^\+S:CONFIG_MACH/{p;g;s/^CONFIG_TARGET/+S:&/;p;n};

    # Print any remaining lines normally
    p;
Run as:
    sed -i -n -f t $(git grep -l CONFIG_ARCH_SUNXI configs/*)
and then manually removing the one instance of CONFIG_SYS_EXTRA_OPTIONS="" from
Colombus_defconfig

board/sunxi/Makefile was updated with:
    sed -e 's/^\(obj-\$(CONFIG_\)\(.*\)\().*+= dram_.*\)/\1TARGET_\2\3/g' board/sunxi/Makefile
and manually retabbing a few lines to line up again.

The board descriptions could certainly be improved.

Signed-off-by: Ian Campbell <ijc@hellion.org.uk>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
diff --git a/board/sunxi/Makefile b/board/sunxi/Makefile
index 6a2e4c9..b84ff9b 100644
--- a/board/sunxi/Makefile
+++ b/board/sunxi/Makefile
@@ -11,26 +11,26 @@
 obj-y	+= board.o
 obj-$(CONFIG_SUNXI_GMAC)	+= gmac.o
 obj-$(CONFIG_SUNXI_AHCI)	+= ahci.o
-obj-$(CONFIG_A10_OLINUXINO_L)	+= dram_a10_olinuxino_l.o
-obj-$(CONFIG_A10S_OLINUXINO_M)	+= dram_a10s_olinuxino_m.o
-obj-$(CONFIG_A13_OLINUXINO)	+= dram_a13_olinuxino.o
-obj-$(CONFIG_A13_OLINUXINOM)	+= dram_a13_oli_micro.o
-obj-$(CONFIG_A20_OLINUXINO_L)	+= dram_a20_olinuxino_l.o
-obj-$(CONFIG_A20_OLINUXINO_L2)	+= dram_a20_olinuxino_l2.o
-obj-$(CONFIG_A20_OLINUXINO_M)	+= dram_sun7i_384_1024_iow16.o
+obj-$(CONFIG_TARGET_A10_OLINUXINO_L)	+= dram_a10_olinuxino_l.o
+obj-$(CONFIG_TARGET_A10S_OLINUXINO_M)	+= dram_a10s_olinuxino_m.o
+obj-$(CONFIG_TARGET_A13_OLINUXINO)	+= dram_a13_olinuxino.o
+obj-$(CONFIG_TARGET_A13_OLINUXINOM)	+= dram_a13_oli_micro.o
+obj-$(CONFIG_TARGET_A20_OLINUXINO_L)	+= dram_a20_olinuxino_l.o
+obj-$(CONFIG_TARGET_A20_OLINUXINO_L2)	+= dram_a20_olinuxino_l2.o
+obj-$(CONFIG_TARGET_A20_OLINUXINO_M)	+= dram_sun7i_384_1024_iow16.o
 # This is not a typo, uses the same mem settings as the a10s-olinuxino-m
-obj-$(CONFIG_AUXTEK_T004)	+= dram_a10s_olinuxino_m.o
-obj-$(CONFIG_BA10_TV_BOX)	+= dram_sun4i_384_1024_iow8.o
-obj-$(CONFIG_BANANAPI)		+= dram_bananapi.o
-obj-$(CONFIG_CUBIEBOARD)	+= dram_cubieboard.o
-obj-$(CONFIG_CUBIEBOARD2)	+= dram_cubieboard2.o
-obj-$(CONFIG_CUBIETRUCK)	+= dram_cubietruck.o
-obj-$(CONFIG_I12_TVBOX)		+= dram_sun7i_384_1024_iow16.o
-obj-$(CONFIG_MELE_A1000)	+= dram_sun4i_360_512.o
-obj-$(CONFIG_MELE_A1000G)	+= dram_sun4i_360_1024_iow8.o
-obj-$(CONFIG_MELE_M3)		+= dram_sun7i_384_1024_iow16.o
-obj-$(CONFIG_MINI_X)		+= dram_sun4i_360_512.o
-obj-$(CONFIG_MINI_X_1GB)	+= dram_sun4i_360_1024_iow16.o
-obj-$(CONFIG_PCDUINO3)		+= dram_linksprite_pcduino3.o
-obj-$(CONFIG_QT840A)		+= dram_sun7i_384_512_busw16_iow16.o
-obj-$(CONFIG_R7DONGLE)		+= dram_r7dongle.o
+obj-$(CONFIG_TARGET_AUXTEK_T004)	+= dram_a10s_olinuxino_m.o
+obj-$(CONFIG_TARGET_BA10_TV_BOX)	+= dram_sun4i_384_1024_iow8.o
+obj-$(CONFIG_TARGET_BANANAPI)		+= dram_bananapi.o
+obj-$(CONFIG_TARGET_CUBIEBOARD)		+= dram_cubieboard.o
+obj-$(CONFIG_TARGET_CUBIEBOARD2)	+= dram_cubieboard2.o
+obj-$(CONFIG_TARGET_CUBIETRUCK)		+= dram_cubietruck.o
+obj-$(CONFIG_TARGET_I12_TVBOX)		+= dram_sun7i_384_1024_iow16.o
+obj-$(CONFIG_TARGET_MELE_A1000)		+= dram_sun4i_360_512.o
+obj-$(CONFIG_TARGET_MELE_A1000G)	+= dram_sun4i_360_1024_iow8.o
+obj-$(CONFIG_TARGET_MELE_M3)		+= dram_sun7i_384_1024_iow16.o
+obj-$(CONFIG_TARGET_MINI_X)		+= dram_sun4i_360_512.o
+obj-$(CONFIG_TARGET_MINI_X_1GB)		+= dram_sun4i_360_1024_iow16.o
+obj-$(CONFIG_TARGET_PCDUINO3)		+= dram_linksprite_pcduino3.o
+obj-$(CONFIG_TARGET_QT840A)		+= dram_sun7i_384_512_busw16_iow16.o
+obj-$(CONFIG_TARGET_R7DONGLE)		+= dram_r7dongle.o