USB: phy-msm-usb: Remove extra reset on host cable disconnect

There is no need to reset hardware in A_SUSPEND state as it
is already done in B_IDLE state.

CRs-fixed: 652369
Change-Id: I401a2d3c765236c275ce6d4f4445462951f74f59
Signed-off-by: Manu Gautam <mgautam@codeaurora.org>