shamu: Fix BOARD_MKBOOTIMG_ARGS

Change-Id: I788efef709976e20d259e51529fb600e7a763e83
diff --git a/BoardConfig.mk b/BoardConfig.mk
index a48702d..0c51a4b 100644
--- a/BoardConfig.mk
+++ b/BoardConfig.mk
@@ -29,7 +29,7 @@
 
 BOARD_KERNEL_CMDLINE := console=ttyHSL0,115200,n8 androidboot.console=ttyHSL0 androidboot.hardware=shamu msm_rtb.filter=0x37 ehci-hcd.park=3 utags.blkdev=/dev/block/platform/msm_sdcc.1/by-name/utags utags.backup=/dev/block/platform/msm_sdcc.1/by-name/utagsBackup coherent_pool=8M
 
-BOARD_MKBOOTIMG_ARGS := --ramdisk_offset BOARD_RAMDISK_OFFSET --tags_offset BOARD_KERNEL_TAGS_OFFSET
+BOARD_MKBOOTIMG_ARGS := --ramdisk_offset $(BOARD_RAMDISK_OFFSET) --tags_offset $(BOARD_KERNEL_TAGS_OFFSET)
 
 # Shader cache config options
 # Maximum size of the  GLES Shaders that can be cached for reuse.