ANDROID: USF: Fix MMC/UFS IO latency histograms

Fix MMC/UFS IO latency histograms by aligning with the changes from
upstream commit aebf526b ("block: fold cmd_type into the REQ_OP_ space")

Fixes: android-4.9 commit e2d88788d5b0 ("ANDROID: MMC/UFS IO Latency Histograms.")
Signed-off-by: Amit Pundir <amit.pundir@linaro.org>