defconfig: mmc: Enable CONFIG_MMC_TEST for all MSM targets

Now that all the test cases in mmc_test.c run as expected
on MSM targets, enable CONFIG_MMC_TEST as kernel module to
test SD/MMC cards.

Change-Id: I91c16c1f404343a2fe52c44573667df25b85e4e1
Signed-off-by: Sujit Reddy Thumma <sthumma@codeaurora.org>
9 files changed