USB: phy-msm-usb: Enable APF only during peripheral mode

APF feature is only helpful in case of peripheral mode
where it helps improve the throughput related to data
call, media transfer protocol or mass storage based
transfers. Enabling this feature during host mode
is not needed.

Hence, disable this feature when hcd is about to get
added, and enable this back again before remove hcd.

Change-Id: I9702f6f739b1ab43c30f14b3a795fb81cf06724b
Signed-off-by: Sujeet Kumar <ksujeet@codeaurora.org>