mmc: host: omap_hsmmc: avoid possible overflow of timeout value

commit a53210f56d7f3f75d1edc1b3a069ddb87b72a919 upstream.

Fixes: a45c6cb81647 ("[ARM] 5369/1: omap mmc: Add new omap
hsmmc controller for 2430 and 34xx, v3")

when using really large timeout (up to 4*60*1000 ms for bkops)
there is a possibility of data overflow using
unsigned int so use 64 bit unsigned long long.

Signed-off-by: Ravikumar Kattekola <rk@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
[bwh: Backported to 3.2:
 - Drop change in omap_hsmmc_prepare_data()
 - Adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

diff --cc drivers/mmc/host/omap_hsmmc.c
Simple merge