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/PM826.h b/include/configs/PM826.h
index 6d24c26..31874b1 100644
--- a/include/configs/PM826.h
+++ b/include/configs/PM826.h
@@ -39,6 +39,10 @@
 #define CONFIG_PM826		1	/* ...on a PM8260 module	*/
 #define CONFIG_CPM2		1	/* Has a CPM2 */
 
+#ifndef CONFIG_SYS_TEXT_BASE
+#define CONFIG_SYS_TEXT_BASE	0xFF000000	/* Standard: boot 64-bit flash */
+#endif
+
 #undef CONFIG_DB_CR826_J30x_ON		/* J30x jumpers on D.B. carrier	*/
 
 #define CONFIG_BOOTDELAY	5	/* autoboot after 5 seconds	*/