mmc: msm_sdcc: Add eMMCv4.5 BKOPS feature support

The change sets these bits in caps2 field of host controller:
1. MMC_CAP2_BKOPS - enables msm_sdcc host support for BKOPS.
2. MMC_CAP2_INIT_BKOPS - will set the BKOPS_EN bit in card
   ext_csd register. The bit is one time programmable.

Change-Id: Ic74e025469efdfaaec6d6fe6dc8bacc60462724d
Signed-off-by: Konstantin Dorfman <kdorfman@codeaurora.org>
diff --git a/drivers/mmc/host/msm_sdcc.c b/drivers/mmc/host/msm_sdcc.c
index 29c09c4..e6405ab 100644
--- a/drivers/mmc/host/msm_sdcc.c
+++ b/drivers/mmc/host/msm_sdcc.c
@@ -5030,6 +5030,8 @@
 		mmc->caps |= MMC_CAP_NONREMOVABLE;
 	mmc->caps |= MMC_CAP_SDIO_IRQ;
 
+	mmc->caps2 |= MMC_CAP2_INIT_BKOPS | MMC_CAP2_BKOPS;
+
 	if (plat->is_sdio_al_client)
 		mmc->pm_flags |= MMC_PM_IGNORE_PM_NOTIFY;