defconfig: msm: remove unused decompression methods for msmcortex

For msmcortex 64-bit, kernel decompression is done by LK and kernel
decompression methods are not used; so, remove it.

Change-Id: I634b9af27b5e86cc97a20eb58f1c2d68fd25f5a9
Signed-off-by: Atanas Filipov <afilipov@codeaurora.org>