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/mcc200.h b/include/configs/mcc200.h
index 00097c9..72d9750 100644
--- a/include/configs/mcc200.h
+++ b/include/configs/mcc200.h
@@ -33,6 +33,16 @@
 #define CONFIG_MPC5xxx		1	/* This is an MPC5xxx CPU		*/
 #define CONFIG_MCC200		1	/* ... on MCC200 board			*/
 
+/*
+ * Valid values for CONFIG_SYS_TEXT_BASE are:
+ * 0xFC000000	boot low (standard configuration)
+ * 0xFFF00000	boot high
+ * 0x00100000	boot from RAM (for testing only)
+ */
+#ifndef CONFIG_SYS_TEXT_BASE
+#define CONFIG_SYS_TEXT_BASE	0xFC000000
+#endif
+
 #define CONFIG_SYS_MPC5XXX_CLKIN	33000000 /* ... running at 33MHz		*/
 
 #define CONFIG_MISC_INIT_R