mmc: Revert BKOPs feature

A newer version of BKOps should be picked from the community.
Therefore the old support is reverted.
Revert the following commits:
9db69fca22bd2970f6b14b50cf8533a1edb64364
8ac659eb3d96e31b8bb6b8d09143ddd6eb83ae19
f886c80ee2f4c29aeaab2d76c9303c00263bb428

Change-Id: I6b97c24cb8328759dc27b36cdbc42259a518fbae
Signed-off-by: Maya Erez <merez@codeaurora.org>