mmc: core: Fix mmc_set_ios w.r.t. error handling sequence

In case of error, software may power cycle/reset both
controller and card. Thus even if auto bkops is enabled,
mmc_set_ios can be used to power-off/power-on.

Fix this by removing this condition from mmc_set_ios.

Change-Id: I88a610ecbcc4036ac8ba99bc54706243b40db391
Signed-off-by: Ritesh Harjani <riteshh@codeaurora.org>