Add support for EMMC storage type

Add support for parsing EMMC specific address for hwkm
slave in cqhci crypto driver. Add similar support
in ufs crypto driver as well to get UFS specific address.
Remove support for parsing the hwkm slave address from dtsi
node from hwkm driver as it will be received as part of
hwkm_init(). Enable/disable cqhci crypto from cqhci_enable and
cqhci_disable instead of __cqhci_enable and __cqhci_disable.

Test:
1. Device booted upto UI with File Based Encryption enabled.
2. Key insertion using fscryptctl tool.
3. Created new files under /data and checked retention across
   multiple re-boots.
4. vts_kernel_encryption_test tests.
5. check_encryption test for verifying metadata encryption.
6. Bootup wth qgki compiled build.
7. Bootup on holi and shima UFS device.
8. Setting encryption policy and read/write of data over multiple
   reboots, using fscryptctl tool.

Change-Id: I1f437ebf8a3f4cd008027d708ccacc02dfb14d07
Signed-off-by: Vaibhav Agrawal <vagrawa@codeaurora.org>