MPC7xx: remove obsolete "BAB7xx" board

The BAB7xx boards are almost deceased.  They cause build warnings, an
it's not worth the effort to fix these.  Remove the dead body.

Signed-off-by: Wolfgang Denk <wd@denx.de>
Cc: Frank Gottschling <fgottschling@eltec.de>
diff --git a/README b/README
index 3ddec77..e9d1891 100644
--- a/README
+++ b/README
@@ -564,7 +564,7 @@
 
 		CONFIG_CFB_CONSOLE
 		Enables console device for a color framebuffer. Needs following
-		defines (cf. smiLynxEM, i8042, board/eltec/bab7xx)
+		defines (cf. smiLynxEM, i8042)
 			VIDEO_FB_LITTLE_ENDIAN	graphic memory organisation
 						(default big endian)
 			VIDEO_HW_RECTFILL	graphic chip supports