In preparation for supporting a queue of requests, factor out
mmc_queue_alloc_bounce_sgs().
Signed-off-by: NAdrian Hunter <adrian.hunter@intel.com>
Reviewed-by: NLinus Walleij <linus.walleij@linaro.org>
Reviewed-by: NHarjani Ritesh <riteshh@codeaurora.org>
[Ulf: Fixed compiler warning]
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>