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/MPC8568MDS.h b/include/configs/MPC8568MDS.h
index 3a405d4..054991e 100644
--- a/include/configs/MPC8568MDS.h
+++ b/include/configs/MPC8568MDS.h
@@ -33,6 +33,8 @@
 #define CONFIG_MPC8568		1	/* MPC8568 specific */
 #define CONFIG_MPC8568MDS	1	/* MPC8568MDS board specific */
 
+#define	CONFIG_SYS_TEXT_BASE	0xfff80000
+
 #define CONFIG_PCI		1	/* Enable PCI/PCIE */
 #define CONFIG_PCI1		1	/* PCI controller */
 #define CONFIG_PCIE1		1	/* PCIE controller */