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/TOP5200.h b/include/configs/TOP5200.h
index f9d1446..2654a44 100644
--- a/include/configs/TOP5200.h
+++ b/include/configs/TOP5200.h
@@ -45,6 +45,14 @@
 #define CONFIG_MPC5200		1	/* More exactly a MPC5200 */
 #define CONFIG_TOP5200		1	/* ... on TOP5200 board - we need this for FEC.C */
 
+/*
+ * allowed and functional CONFIG_SYS_TEXT_BASE values:
+ * 0xff000000	low boot at 0x00000100 (default board setting)
+ * 0xfff00000	high boot at 0xfff00100 (board needs modification)
+ * 0x00100000	RAM load and test
+ */
+#define	CONFIG_SYS_TEXT_BASE	0xff000000
+
 #define CONFIG_SYS_MPC5XXX_CLKIN	33000000 /* ... running at 33.000000MHz */
 
 #define BOOTFLAG_COLD		0x01	/* Normal Power-On: Boot from FLASH  */