mmc: sdhci: ignore the hardware timeout when requested

Few card commands can be interrupted (using HPI command) if it takes
longer time to complete so in such case its acceptable to get the
timeout errors hence ignore them when MMC core layer request for it.

Change-Id: Ie0beb93e2a7e245703504c4a2b3672051fd4d938
Signed-off-by: Subhash Jadavani <subhashj@codeaurora.org>