mmc: dw_mmc: fix incorrect setting of host->data of NULL
mmc: dw_mmc: fix incorrect setting of host->data of NULL

Setting host->data to NULL is incorrect sequence in
dw_mci_command_complete. This early setting makes the skip of
dma_unmap_sg in dw_mci_dma_cleanup.

Signed-off-by: Seungwon Jeon <a133bc924ee401eac4c4f97927180f14b8a9baec@samsung.com>
Acked-by: Will Newton <71feca22d1203964f870c694beb32f4f811c5219@gmail.com>
Signed-off-by: Chris Ball <6ca7faee6ca9a094b1ee341f11b840a5608a8746@laptop.org>

TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs