defconfig: Enable iommu tlb inv. for msm8974, msm8226 and apq8084

Due to a hardware bug on msm8974, msm8226 and apq8084, the TLB
has to be invalidated during map and map range operations. Enable
the config option to do the same.

Change-Id: Iaba8fc77430cbb01332c3d1581ddfc06238fb2de
Signed-off-by: Neeti Desai <neetid@codeaurora.org>