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/IPHASE4539.h b/include/configs/IPHASE4539.h
index 9d19e37..88ef4bb 100644
--- a/include/configs/IPHASE4539.h
+++ b/include/configs/IPHASE4539.h
@@ -38,6 +38,8 @@
 #define CONFIG_MPC8260		1	/* This is an MPC8260 CPU   */
 #define CONFIG_IPHASE4539	1	/* ...on a Interphase 4539 PMC */
 
+#define	CONFIG_SYS_TEXT_BASE	0xffb00000
+
 #define CONFIG_CPM2		1	/* Has a CPM2 */
 
 /*-----------------------------------------------------------------------