mmc: Don't remove hostfw if it's not being updated

The image-hostfw is optional, therefore don't delete it unless it's
going to be updated, to prevent ending up with a system that doesn't
have a bios image to boot with.

Tested: Verify the hostfw image doesn't get deleted unless the tarball
contains an image-hostfw file.

Change-Id: Ifd48988d1a499eb8a3539701f12ca43efcb56f6d
Signed-off-by: Adriana Kobylak <anoo@us.ibm.com>
1 file changed