mmc: allow upper layers to know immediately if card has been removed

mmc: allow upper layers to know immediately if card has been removed

BZ: 18012

[PORT FROM UPSTREAM]

	Add a function mmc_detect_card_removed() which upper layers can use to
	determine immediately if a card has been removed. This function should
	be called after an I/O request fails so that all queued I/O requests
	can be errored out immediately instead of waiting for the card device
	to be removed.

	Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
	Acked-by: Sujit Reddy Thumma <sthumma@codeaurora.org>
	Signed-off-by: Chris Ball <cjb@laptop.org>
Change-Id: I3b602d69e0cc3c5a49245a35adcd227d849103b9
Signed-off-by: Chuanxiao Dong <chuanxiao.dong@intel.com>
Reviewed-on: http://android.intel.com:8080/29373
Reviewed-by: Tang, Richard <richard.tang@intel.com>
Tested-by: Sun, Jianhua <jianhua.sun@intel.com>
Reviewed-by: Zayet, AymenX <aymenx.zayet@intel.com>
Reviewed-by: buildbot <buildbot@intel.com>
Tested-by: buildbot <buildbot@intel.com>