mmc-erase : Modified code to increase erase functionality.

For partitions whose size is less than erase_group_size 0 is written
in the first block of the partition. For partitions whose size is
greater than erase_group_size the entire partition is erased in terms
of erase_group_size.

Change-Id: I300a4ec2dcb109e996d78e8d0b18b21383e14be9
1 file changed