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/kmsupx4.h b/include/configs/kmsupx4.h
index 8f1e602..228bdd7 100644
--- a/include/configs/kmsupx4.h
+++ b/include/configs/kmsupx4.h
@@ -32,6 +32,8 @@
 #define CONFIG_KMSUPX4		1	/* ...on a kmsupx4 board	*/
 #define CONFIG_HOSTNAME		kmsupx4
 
+#define	CONFIG_SYS_TEXT_BASE	0xf0000000
+
 /* include common defines/options for all Keymile 8xx boards */
 #include "km8xx.h"