UPSTREAM: fix ENH_START_ADDR overflow

Fix enh_start_addr overflow when converting emmc enh_area which will
cause do_enh_area_set failure.

BUG=None
TEST=Compile

Signed-off-by: jason.zeng <[email protected]>
Signed-off-by: Chris Ball <[email protected]>
(cherry picked from commit b4fe0c8c0e57a74c01755fa9362703b60d7ee49d)
Signed-off-by: Gwendal Grignou <[email protected]>

Change-Id: I6cfb0ca7237891058b90d989cac9c1330352eda5
Reviewed-on: https://chromium-review.googlesource.com/1114457
Commit-Ready: Gwendal Grignou <[email protected]>
Tested-by: Gwendal Grignou <[email protected]>
Reviewed-by: Julius Werner <[email protected]>
1 file changed