mmc: auto bkops fixes

Change "man_bkops_en" to "bkops_en" to hold the status of
both manual and auto bkops.

Change-Id: I60029bae67cebb2c91147ad741b96f4caed9c1d9
Signed-off-by: Subhash Jadavani <subhashj@codeaurora.org>
[xiaonian@codeaurora.org: fixed trivial merge conflicts]
Signed-off-by: Xiaonian Wang <xiaonian@codeaurora.org>