arm64: msm: Add support for uncompressed kernel image

Add support for uncompressed kernel image in msm-4.14.

Change-Id: I62229187e1f3e0ec11ff4b5a31c36dcee86dc8b7
Signed-off-by: Atanas Filipov <afilipov@codeaurora.org>
[rananta@codeaurora.org: Resolve trivial merge conflicts
and updated commit text]
Signed-off-by: Raghavendra Rao Ananta <rananta@codeaurora.org>