mmc: omap_hsmmc: adapt hsmmc to use pbias regulator
mmc: omap_hsmmc: adapt hsmmc to use pbias regulator

In DT case, PBAIS registers are programmed via regulator,
use regulator APIs to control PBIAS.

Signed-off-by: Balaji T K <f0390b3e7c10fea0f9130d79020718fd0f40ef6b@ti.com>
Tested-by: Florian Vaussard <ef1e2bd37ca89620283a38ee0519838a257cab3b@epfl.ch>
Tested-by: Stefan Roese <44b7497c4bb5f3e8c071b12b7ece82766a88068d@denx.de>
Signed-off-by: Chris Ball <711c73f64afdce07b7e38039a96d2224209e9a6c@printf.net>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs