Add ufs proxy power supply to add an additional vote for VCCQ LDO.
In case of ufs shutdown, UFS VCCQ LDO would be turned off by PMIC
regulator itself.
Change-Id: I210474d8856f8b1160cc707db17898b1c0403093
Signed-off-by: Manish Pandey <quic_mapa@quicinc.com>