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/PM854.h b/include/configs/PM854.h
index 1179a90..8a0af47 100644
--- a/include/configs/PM854.h
+++ b/include/configs/PM854.h
@@ -41,6 +41,8 @@
 #define CONFIG_MPC8540		1	/* MPC8540 specific */
 #define CONFIG_PM854		1	/* PM854 board specific */
 
+#define	CONFIG_SYS_TEXT_BASE	0xfff80000
+
 #define CONFIG_PCI
 #define CONFIG_TSEC_ENET		/* tsec ethernet support */
 #define CONFIG_ENV_OVERWRITE