mmc: core: Extend mmc_do_hw_reset for SD cards

Sometimes even SD cards doesn't respond to commands when the
card enters into some bad state due to errors. To recover from
this state, a power cycle is issued to the card and it is
reinitialized again.

Change-Id: I7f5990b1210f1d7d2b0c3da7f2d7b757809d1977
Signed-off-by: Sahitya Tummala <stummala@codeaurora.org>