xhci: hsic: Return if port is not enabled during hsic suspend

In cases when remove is not called HSIC phy will timeout waiting
to go in suspended state and this will cause a panic.
So in such cases during HSIC suspend, if port is not enabled
then return busy, instead of panic.

CRs-fixed: 692376
Change-Id: I2cc4dc798d5ccf0d0da6597c875d9fb4044dbaaa
Signed-off-by: Azhar Shaikh <azhars@codeaurora.org>