defconfig: msm: Disable EXT2 and EXT3 FS configs for MSM8937/53

This is required to fix the VTS test case failures which are failing
as the kernel supports EXT2/EXT3 but the tools mkfs.ext2/mkfs.ext3
doesn't exist anymore.

Change-Id: Ie2ddd6a036546210ead3d30ce42b77a100c27bb6
Signed-off-by: Naitik Bharadiya <bharad@codeaurora.org>