fix(intel): refactor SDMMC driver for Altera products

Refactor to be more robust. Removed duplicated and not used functions.
Add in ADMA read.

Change-Id: I1a5a00397ece6f9ccc5916225ab5317010b01b52
Signed-off-by: Jit Loon Lim <jit.loon.lim@intel.com>
Signed-off-by: Sieu Mun Tang <sieu.mun.tang@intel.com>
11 files changed