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/XPEDITE1000.h b/include/configs/XPEDITE1000.h
index c378542..b2399c6 100644
--- a/include/configs/XPEDITE1000.h
+++ b/include/configs/XPEDITE1000.h
@@ -39,6 +39,8 @@
 #define CONFIG_BOARD_EARLY_INIT_F 1		/* Call board_pre_init	*/
 #define CONFIG_SYS_CLK_FREQ	33333333	/* external freq to pll */
 
+#define	CONFIG_SYS_TEXT_BASE	0xFFF80000
+
 /*
  * DDR config
  */