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/virtlab2.h b/include/configs/virtlab2.h
index 7046e67..619c430 100644
--- a/include/configs/virtlab2.h
+++ b/include/configs/virtlab2.h
@@ -37,6 +37,8 @@
 #define CONFIG_VIRTLAB2		1	/* ...on a virtlab2 module	*/
 #define	CONFIG_TQM8xxL		1
 
+#define	CONFIG_SYS_TEXT_BASE	0x40000000
+
 #define	CONFIG_8xx_CONS_SMC1	1	/* Console is on SMC1		*/
 #define CONFIG_SYS_SMC_RXBUFLEN	128
 #define CONFIG_SYS_MAXIDLE	10