mpc85xx: configs: remove c=ffe from default environment

AFAICT, c=ffe does nothing and was a typo from the original commit
d17123696c6180ac8b74fbd318bf14652623e982 "powerpc/p4080: Add support
for the P4080DS board" and just kept on getting duplicated
in subsequently added board config files.

Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
Acked-by: Edward Swarthout <ed.swarthout@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>
diff --git a/include/configs/T208xRDB.h b/include/configs/T208xRDB.h
index 5b26178..626b562 100644
--- a/include/configs/T208xRDB.h
+++ b/include/configs/T208xRDB.h
@@ -797,8 +797,7 @@
 	"ramdiskfile=t2080rdb/ramdisk.uboot\0"			\
 	"fdtaddr=c00000\0"					\
 	"fdtfile=t2080rdb/t2080rdb.dtb\0"			\
-	"bdev=sda3\0"						\
-	"c=ffe\0"
+	"bdev=sda3\0"
 
 /*
  * For emulation this causes u-boot to jump to the start of the