mmc: sdhci-msm: configure regulators only if defined in dts
mmc: sdhci-msm: configure regulators only if defined in dts

This patch adds support to configure regulators only if
it is defined in dts files. However, it doesn't return an
error otherwise.

Change-Id: Iac2284b2df3b3d8af623da0f17697694994b34b8
Signed-off-by: Asutosh Das <ba04796cdc27a78fb5b7ed5fd78046b04268af75@codeaurora.org>

TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas