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/v38b.h b/include/configs/v38b.h
index e2db0b0..26ebaba 100644
--- a/include/configs/v38b.h
+++ b/include/configs/v38b.h
@@ -29,6 +29,9 @@
 #define CONFIG_MPC5xxx			1	/* This is an MPC5xxx CPU */
 #define CONFIG_MPC5200			1	/* This is an MPC5200 CPU */
 #define CONFIG_V38B			1	/* ...on V38B board */
+
+#define	CONFIG_SYS_TEXT_BASE		0xFF000000
+
 #define CONFIG_SYS_MPC5XXX_CLKIN	33000000	/* ...running at 33.000000MHz */
 
 #define CONFIG_RTC_PCF8563		1	/* has PCF8563 RTC */