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/aev.h b/include/configs/aev.h
index 15a242c..187e5c1 100644
--- a/include/configs/aev.h
+++ b/include/configs/aev.h
@@ -41,6 +41,17 @@
 #define CONFIG_AEVFIFO		1
 #define CONFIG_SYS_MPC5XXX_CLKIN	33000000 /* ... running at 33.000000MHz */
 
+/*
+ * Valid values for CONFIG_SYS_TEXT_BASE are:
+ * 0xFC000000	boot low (standard configuration with room for
+ *		max 64 MByte Flash ROM)
+ * 0xFFF00000	boot high (for a backup copy of U-Boot)
+ * 0x00100000	boot from RAM (for testing only)
+ */
+#ifndef CONFIG_SYS_TEXT_BASE
+#define CONFIG_SYS_TEXT_BASE	0xFC000000
+#endif
+
 #define CONFIG_HIGH_BATS	1	/* High BATs supported */
 
 #define BOOTFLAG_COLD		0x01	/* Normal Power-On: Boot from FLASH  */