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/stxssa.h b/include/configs/stxssa.h
index 2a4758e..e4493a9 100644
--- a/include/configs/stxssa.h
+++ b/include/configs/stxssa.h
@@ -43,6 +43,8 @@
 #define CONFIG_STXSSA		1	/* Silicon Tx GPPP SSA board specific*/
 #define CONFIG_MPC8560		1
 
+#define	CONFIG_SYS_TEXT_BASE	0xFFFC0000
+
 #define CONFIG_PCI			/* PCI ethernet support	*/
 #define CONFIG_TSEC_ENET		/* tsec ethernet support*/
 #undef CONFIG_ETHER_ON_FCC		/* cpm FCC ethernet support */