Revert "Revert "m7spr: handle recovery fstab in m7-common""

This reverts commit 4a350195d7cb8bc40c23b7d706042e0d24ee4d56

Change-Id: Ibb8d239a813ee0b47b241357a8d4d06d3a5979d2
Merge "Revert "Revert "m7spr: handle recovery fstab in m7-common""" into jellybean