km/common: use u-boot.kwb for u-boot update function on arm

Now we use the standard u-boot make to build the Kirkwood binary.
The output file is u-boot.kwb. So use this name for the tftp
update function to avoid confusion, because this is the binary we
need on Kirkwood.

Signed-off-by: Holger Brunck <holger.brunck@keymile.com>
cc: Valentin Longchamp <valentin.longchamp@keymile.com>
cc: Heiko Schocher <hs@denx.de>
cc: Wolfgang Denk <wd@denx.de>

include/configs/km/keymile-common.h

@@ -248,7 +248,6 @@
 	"stderr=serial\0"						\
 	"stdin=serial\0"						\
 	"stdout=serial\0"						\
-	"u-boot="xstr(CONFIG_HOSTNAME) "/u-boot.bin\0"			\
 	""
 #endif /* CONFIG_KM_DEF_ENV */
 

include/configs/km/km-powerpc.h

@@ -75,6 +75,7 @@
 		"cramfsload ${fdt_addr_r} "				\
 		"fdt_0x${IVM_BoardId}_0x${IVM_HWKey}.dtb\0"		\
 	"fdt_addr_r=" xstr(CONFIG_KM_FDT_ADDR) "\0"			\
+	"u-boot="xstr(CONFIG_HOSTNAME) "/u-boot.bin\0"			\
 	"update="							\
 		"protect off " xstr(BOOTFLASH_START) " +${filesize} && "\
 		"erase " xstr(BOOTFLASH_START) "  +${filesize} && "	\

include/configs/km/km_arm.h

@@ -74,6 +74,7 @@
 #define CONFIG_KM_DEF_ENV_CPU						\
 	"boot=bootm ${load_addr_r} - -\0"				\
 	"cramfsloadfdt=true\0"						\
+	"u-boot="xstr(CONFIG_HOSTNAME) "/u-boot.kwb\0"			\
 	CONFIG_KM_DEF_ENV_UPDATE					\
 	""