msm: defconfig: Enable building of smcmod driver for MSM8226

This will enable building of smcmod driver on MSM8226 targets. This
driver is needed by OTA update mechanism and will be used to decrypt
images.

Change-Id: Id8157d4aac75dd2e1031701f9da0696111851763
Signed-off-by: Stanimir Varbanov <svarba@codeaurora.org>