usb: ci13xxx_msm_hsic: Cleanup usage of xo voting

On newer platforms, it is not required to vote for XO when using
USB HSIC core with device mode. Hence remove usage of XO voting
from driver and fix error handling accordingly.

Change-Id: I738288745b9dc04f07a3285fcdfea8b61d343b0b
Signed-off-by: Mayank Rana <mrana@codeaurora.org>