mmc: sdhci-esdhc-imx: fix indent

Fix indent. This also makes disable/enable clock blocks look
alike.
Signed-off-by: NStefan Agner <stefan@agner.ch>
Acked-by: NDong Aisheng <aisheng.dong@nxp.com>
Acked-by: NAdrian Hunter <adrian.hunter@intel.com>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>