mmc: host: Use right parameter for ext4 plus eMMC

With new encryption framework intermediate vector
calculation is changed so to support the legacy
mechanism for ext4 file system use correct parameter
for data encrypt/decrypt.

Ported and fixed the merged conflicts in cqhci-crypto-qti.c file
(cherry picked from mainline kernel_msm-4.14 commit 3344057)

Conflicts:
	drivers/mmc/host/cqhci-crypto-qti.c

Test:
1) Flashed Q meta, create multiple files under /data.
2) Build R (include changes topic: 660_OTA_FIXES) and flash
   APPS images of R except userdata and boot the device.
3) Device booted upto UI.
4) Files created with Q build retained.
5) Created new files under /data and checked retention across
   multiple re-boots.

Change-Id: I678c291c6a9a91a7aa8e9c64512dd23451873198
Signed-off-by: Neeraj Soni <neersoni@codeaurora.org>
Signed-off-by: Jiten Patel <jitepate@codeaurora.org>