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/uc100.h b/include/configs/uc100.h
index 23f4c82..f1c09f3 100644
--- a/include/configs/uc100.h
+++ b/include/configs/uc100.h
@@ -40,6 +40,8 @@
 
 #define CONFIG_UC100		1	/* ...on a UC100 module	        */
 
+#define	CONFIG_SYS_TEXT_BASE	0x40700000
+
 #define MPC8XX_FACT		4		/* Multiply by 4	*/
 #define MPC8XX_XIN		25000000	/* 25.0 MHz in		*/
 #define CONFIG_8xx_GCLK_FREQ	(MPC8XX_FACT * MPC8XX_XIN)