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/include/configs/BC3450.h b/include/configs/BC3450.h
index f6246fa..4fbcb7d 100644
--- a/include/configs/BC3450.h
+++ b/include/configs/BC3450.h
@@ -56,6 +56,16 @@
 #define CONFIG_BC3450_FP	1	/*  + enable FP O/P		    */
 #undef CONFIG_BC3450_CRT		/*  + enable CRT O/P (Debug only!)  */
 
+/*
+ * Valid values for CONFIG_SYS_TEXT_BASE are:
+ * 0xFC000000	boot low (standard configuration with room for
+ *		max 64 MByte Flash ROM)
+ * 0x00100000	boot from RAM (for testing only)
+ */
+#ifndef CONFIG_SYS_TEXT_BASE
+#define CONFIG_SYS_TEXT_BASE	0xFC000000
+#endif
+
 #define CONFIG_SYS_MPC5XXX_CLKIN	33000000 /* ... running at 33.000000MHz	    */
 
 #define BOOTFLAG_COLD		0x01	/* Normal Power-On: Boot from FLASH */