usb: phy: ab8500-usb: Rename regulator_set_optimum_mode
usb: phy: ab8500-usb: Rename regulator_set_optimum_mode

The function regulator_set_optimum_mode() is changing name to
regulator_set_load(), so update the code accordingly.

Signed-off-by: Bjorn Andersson <6e6fda072d932515099508d6d220572c68e9add5@sonymobile.com>
Acked-by: Felipe Balbi <94dddeeef08b001e003cce128ddc162a4e2c6cd2@ti.com>
Signed-off-by: Mark Brown <b51b9a92386687a9ac927cebfa0f978adeb8cea5@kernel.org>

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