msm8660_surf: Increase fastboot scratch size to max to 384M

Change-Id: I93faa0965a22028e1b0b906f5b7d00eb81f3c65a
diff --git a/target/msm8660_surf/atags.c b/target/msm8660_surf/atags.c
index 1d016d5..14bd796 100644
--- a/target/msm8660_surf/atags.c
+++ b/target/msm8660_surf/atags.c
@@ -93,5 +93,5 @@
 
 unsigned target_get_max_flash_size(void)
 {
-	return (192 * 1024 * 1024);
+	return (384 * 1024 * 1024);
 }