mmc: sdhci-msm: use the generic sdhci_reset()

The reset functionality has been converted to a library function.
Update the sdhci_ops function table to use the generic
sdhci_reset() library function.

Change-Id: I6c535cd5a641e23399bad284e9a1f89ac8811e62
Signed-off-by: Venkat Gopalakrishnan <venkatg@codeaurora.org>