msm7x30: Mount all partitions in fstab

Android is missing shutdown logic for partitions mounted in init
We mounted the mtd partitions in init in kitkat because for some
reason they couldn't be mounted through fstab

Looks like this works now, so revert back to standard mount way.

Change-Id: I8790ae055f68b2c7593a08357bc1c580c3628f0c