qcom: smblib: suspend usbin on OTG mode

External booster is used in SDM845. USBIN input is not suspended
by PMIC Hardware automatically in OTG moder. Make it in software
driver.

Change-Id: I7cf1ed3e1052741641a08834b0695803e84ec9c2
Signed-off-by: Harry Yang <harryy@codeaurora.org>
Signed-off-by: Abhijeet Dharmapurikar <adharmap@codeaurora.org>