Makefile: move all Power Architecture boards into boards.cfg

Clean up Makefile, and drop a lot of the config.mk files on the way.

We now also automatically pick all boards that are listed in
boards.cfg (and with all configurations), so we can drop the redundant
entries from MAKEALL to avoid building these twice.

Signed-off-by: Wolfgang Denk <wd@denx.de>
diff --git a/board/cpu86/config.mk b/board/cpu86/config.mk
index 3469e73..379017e 100644
--- a/board/cpu86/config.mk
+++ b/board/cpu86/config.mk
@@ -25,17 +25,4 @@
 # CPU86 boards
 #
 
-# This should be equal to the CONFIG_SYS_FLASH_BASE define in config_CPU86.h
-# for the "final" configuration, with U-Boot in flash, or the address
-# in RAM where U-Boot is loaded at for debugging.
-#
-
-ifeq ($(CONFIG_BOOT_ROM),y)
-	CONFIG_SYS_TEXT_BASE := 0xFF800000
-	PLATFORM_CPPFLAGS += -DCONFIG_BOOT_ROM
-else
-	CONFIG_SYS_TEXT_BASE := 0xFF000000
-endif
-
-PLATFORM_CPPFLAGS += -DCONFIG_SYS_TEXT_BASE=$(CONFIG_SYS_TEXT_BASE) \
-	-I$(TOPDIR)
+PLATFORM_CPPFLAGS += -I$(TOPDIR)