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/TQM8260.h b/include/configs/TQM8260.h
index de5a86e..5cbab9b 100644
--- a/include/configs/TQM8260.h
+++ b/include/configs/TQM8260.h
@@ -44,6 +44,8 @@
  * (easy to change)
  */
 
+#define	CONFIG_SYS_TEXT_BASE	0x40000000
+
 #define CONFIG_MPC8260		1	/* This is a MPC8260 CPU		*/
 
 #if 0