MMC: Fix erase group size if ERASE_GRP_DEF

When ERASE_GROUP_DEF (ext_csd[175]) is enabled, HC_ERASE_GRP_SIZE
(ext_csd[224]) defines the erase group size in terms of 512KByte
chunks, but erase_grp_size is in terms of number of write blocks.

Change-Id: Id1d291fccf8a5920346045c84d71062ad7878533
Signed-off-by: Scott Anderson <[email protected]>
1 file changed