sunxi: Kconfig: Make SPL_FEL a toplevel Kconfig option

It's unfortunate that this needs to be present in both .config and spl/.config
since it makes it slightly hard to enable FEL mode for a regular defconfig. It
can be done with:
    echo CONFIG_SPL_FEL=y >> .config
    echo CONFIG_SPL_FEL=y >> spl/.config

Ideally only one of those would be needed.

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/Kconfig b/board/sunxi/Kconfig
index faa38ba..18f731a 100644
--- a/board/sunxi/Kconfig
+++ b/board/sunxi/Kconfig
@@ -42,6 +42,11 @@
 config SYS_SOC
 	default "sunxi"
 
+config SPL_FEL
+	bool "SPL/FEL mode support"
+	depends on SPL
+	default n
+
 config FDTFILE
 	string "Default fdtfile env setting for this board"
 
diff --git a/configs/Cubieboard2_FEL_defconfig b/configs/Cubieboard2_FEL_defconfig
index 1e79720..1b73fb5 100644
--- a/configs/Cubieboard2_FEL_defconfig
+++ b/configs/Cubieboard2_FEL_defconfig
@@ -1,5 +1,6 @@
 CONFIG_SPL=y
-CONFIG_SYS_EXTRA_OPTIONS="CUBIEBOARD2,SPL_FEL,AXP209_POWER,SUNXI_GMAC,AHCI,SATAPWR=SUNXI_GPB(8),USB_EHCI"
++S:CONFIG_SPL_FEL=y
+CONFIG_SYS_EXTRA_OPTIONS="CUBIEBOARD2,AXP209_POWER,SUNXI_GMAC,AHCI,SATAPWR=SUNXI_GPB(8),USB_EHCI"
 CONFIG_FDTFILE="sun7i-a20-cubieboard2.dtb"
 +S:CONFIG_ARM=y
 +S:CONFIG_ARCH_SUNXI=y
diff --git a/configs/Cubietruck_FEL_defconfig b/configs/Cubietruck_FEL_defconfig
index 963ed5a..7e78aec 100644
--- a/configs/Cubietruck_FEL_defconfig
+++ b/configs/Cubietruck_FEL_defconfig
@@ -1,5 +1,6 @@
 CONFIG_SPL=y
-CONFIG_SYS_EXTRA_OPTIONS="CUBIETRUCK,SPL_FEL,AXP209_POWER,SUNXI_GMAC,RGMII,AHCI,SATAPWR=SUNXI_GPH(12),USB_EHCI"
++S:CONFIG_SPL_FEL=y
+CONFIG_SYS_EXTRA_OPTIONS="CUBIETRUCK,AXP209_POWER,SUNXI_GMAC,RGMII,AHCI,SATAPWR=SUNXI_GPH(12),USB_EHCI"
 CONFIG_FDTFILE="sun7i-a20-cubietruck.dtb"
 +S:CONFIG_ARM=y
 +S:CONFIG_ARCH_SUNXI=y