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/zeus.h b/include/configs/zeus.h
index 06d4526..6136af1 100644
--- a/include/configs/zeus.h
+++ b/include/configs/zeus.h
@@ -34,6 +34,8 @@
 #define CONFIG_4xx		1		/* ... PPC4xx family	*/
 #define CONFIG_405EP		1		/* Specifc 405EP support*/
 
+#define	CONFIG_SYS_TEXT_BASE	0xFFFC0000
+
 #define CONFIG_SYS_CLK_FREQ     33000000 /* external frequency to pll   */
 
 #define CONFIG_BOARD_EARLY_INIT_F 1		/* Call board_early_init_f */