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/csb472.h b/include/configs/csb472.h
index 3450e24..ad8811f 100644
--- a/include/configs/csb472.h
+++ b/include/configs/csb472.h
@@ -40,6 +40,8 @@
 #define CONFIG_LAST_STAGE_INIT	1	/* Call last_stage_init()	*/
 #define CONFIG_SYS_CLK_FREQ     25000000 /* external frequency to pll   */
 
+#define	CONFIG_SYS_TEXT_BASE	0xFFFC0000
+
 /*
  * OS Bootstrap configuration
  *