lrdp-v2: Add mmc parser to linux-ramdump-parser

This patch provides mmcdoctor as a parser to get useful debugging
information about mmc driver.

1. This will be helpful in debugging some obvious mmc driver related
issues like -
- clocks are gated for mmc driver.
- bad firmware issues.

2. Provides info on type of error -
- CRC/timeout/software-timeout/ etc.
- Provides useful data structure addresses which otherwise needs to be
  manually parsed

TODO:-
- To add the additional logic to dump the ring buffer in mmc driver
to get last mmc events.

Change-Id: I77845699f90e2d045607a3f7239454cb0ddce29a