mmc: Add IPC tracing events for eMMC and SD card

This changes adds IPC tracing events for EMMC and sdcard
to trace significant events used for debug purpose.

Change-Id: I9b2f86110e9be8a914c51b8796fef5a0ef2c06ad
Signed-off-by: Sayali Lokhande <sayalil@codeaurora.org>
Signed-off-by: Ram Prakash Gupta <rampraka@codeaurora.org>