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/T104xRDB.h b/include/configs/T104xRDB.h
index 81b4f31..e564cb7 100644
--- a/include/configs/T104xRDB.h
+++ b/include/configs/T104xRDB.h
@@ -779,8 +779,7 @@
 	"ramdiskfile=" __stringify(RAMDISKFILE) "\0"		\
 	"fdtaddr=c00000\0"					\
 	"fdtfile=" __stringify(FDTFILE) "\0"			\
-	"bdev=sda3\0"						\
-	"c=ffe\0"
+	"bdev=sda3\0"
 
 #define CONFIG_LINUX                       \
 	"setenv bootargs root=/dev/ram rw "            \