mmc: sdhci: update signal voltage switch code
mmc: sdhci: update signal voltage switch code

The protocol related code is moved to core stack. So update the host
driver accordingly.

Signed-off-by: Kevin Liu <73aaa8dac6e7abf0f8e167c01959afe02d281972@marvell.com>
Tested-by: Tim Wang <c7a3c77890c68577acc435534d52409f237e5001@marvell.com>
Signed-off-by: Chris Ball <6ca7faee6ca9a094b1ee341f11b840a5608a8746@laptop.org>

KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas