usb: otg: msm_otg: Use pm8921 charger functions
usb: otg: msm_otg: Use pm8921 charger functions

On 8921 pmic since msm_charger driver is not used, directly call
api's provided by pm8921.

Change-Id: Iccd3cddc940e0405f45398139bfd01c240f1d5f9
Signed-off-by: Abhijeet Dharmapurikar <98996d53ce579fa37f08d0061abc5355e223c79e@codeaurora.org>

TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas