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: I7b920d0dc9f9e47b67a2a45ee4fa062aeaade051
Signed-off-by: Manish Pandey <quic_mapa@quicinc.com>