Revert misapplied "mmc: sh-mmcif: avoid oops on spurious interrupts"

commit 6984f3c3 upstream.

This reverts commit 8464dd52, which was a misapplied debugging
version of the patch, not the final patch itself.

Signed-off-by: Chris Ball <cjb@laptop.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>