mmc: sdhci-esdhci-imx: re-initialize hw state after resume

sdhci_esdhc_imx_hwinit() includes all basic hw intialization.
Calling it after resume to re-initialize hw in case its state
is already lost in low power mode.

Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>