defconfig: arm: msm: Enable FW_LOADER_USER_HELPER_FALLBACK config flag

This enables udev firmware loading, though kernel fails direct
file loading. This is must need config for loading GPU firmware.
Cherry-picked from 'commit c8c0c339 ("defconfig: arm: msm:
Enable FW_LOADER_USER_HELPER_FALLBACK config flag")'.

Change-Id: I9413885d550252d13e152c6df987a9e03088f71a
Signed-off-by: Nirmal Abraham <nabrah@codeaurora.org>
Signed-off-by: Srinivasarao P <spathi@codeaurora.org>