km/arm: coding style clean up

Address most of the checkpatch issues we found in km_arm and common km
code.

CC: Stefan Roese <sr@denx.de>
CC: Valentin Longchamp <valentin.longchamp@hitachi-powergrids.com>
Signed-off-by: Holger Brunck <holger.brunck@hitachi-powergrids.com>
Reviewed-by: Stefan Roese <sr@denx.de>
diff --git a/include/configs/km/km_arm.h b/include/configs/km/km_arm.h
index 98e0ce1..29060fa 100644
--- a/include/configs/km/km_arm.h
+++ b/include/configs/km/km_arm.h
@@ -48,7 +48,7 @@
 		" boardid=0x${IVM_BoardId} hwkey=0x${IVM_HWKey}"
 
 #define CONFIG_KM_DEF_ENV_CPU						\
-	"u-boot="CONFIG_HOSTNAME "/u-boot.kwb\0"		\
+	"u-boot=" CONFIG_HOSTNAME "/u-boot.kwb\0"		\
 	CONFIG_KM_UPDATE_UBOOT						\
 	"set_fdthigh=setenv fdt_high ${kernelmem}\0"			\
 	"checkfdt="							\