Revert "Revert "mmc: core: Enable multiple urgent requests notification""

This reverts commit 149f9f8efd2047b136e2778e6f0c68ffe5b734a5.

Change-Id: I7401db2c5448933386837d4fc1e946cf52d74c73
Merge "Revert "Revert "mmc: core: Enable multiple urgent requests notification""" into kk_2.7-stable