ppc: Rework some hard-coded BOOTCOMMANDS

There are an assortment of hard-coded CONFIG_BOOTCOMMAND options in some
board headers.  Rework these so that they do not add to the CONFIG
namespace.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/include/configs/MPC8548CDS.h b/include/configs/MPC8548CDS.h
index 3341b3b..c8cba4d 100644
--- a/include/configs/MPC8548CDS.h
+++ b/include/configs/MPC8548CDS.h
@@ -468,7 +468,7 @@
 	"fdtaddr=1e00000\0"			\
 	"fdtfile=mpc8548cds.dtb\0"
 
-#define CONFIG_NFSBOOTCOMMAND						\
+#define NFSBOOTCOMMAND						\
    "setenv bootargs root=/dev/nfs rw "					\
       "nfsroot=$serverip:$rootpath "					\
       "ip=$ipaddr:$serverip:$gatewayip:$netmask:$hostname:$netdev:off " \
@@ -477,7 +477,7 @@
    "tftp $fdtaddr $fdtfile;"						\
    "bootm $loadaddr - $fdtaddr"
 
-#define CONFIG_RAMBOOTCOMMAND \
+#define RAMBOOTCOMMAND \
    "setenv bootargs root=/dev/ram rw "					\
       "console=$consoledev,$baudrate $othbootargs;"			\
    "tftp $ramdiskaddr $ramdiskfile;"					\
@@ -485,6 +485,6 @@
    "tftp $fdtaddr $fdtfile;"						\
    "bootm $loadaddr $ramdiskaddr $fdtaddr"
 
-#define CONFIG_BOOTCOMMAND	CONFIG_NFSBOOTCOMMAND
+#define CONFIG_BOOTCOMMAND	NFSBOOTCOMMAND
 
 #endif	/* __CONFIG_H */