usb: dwc3-msm: Prevent SNPS SS PHY from suspend during runtime suspend

'Commit 9cd474b2 ("usb: dwc3-msm: Add support for snps SSPHY
suspend in system suspend")' added a bug where dwc3_msm_suspend
gets called with 'enable_wakeup' flag set to false from runtime
suspend. This will break remote wakeup/connect scenario which is
still a requirement in runtime suspend case.
Fix it by calling dwc3_msm_suspend with 'enable_wakeup' as true.

Change-Id: I6d29d0c9429d27471d2352944736de03d7e79ddb
Signed-off-by: Ajay Agarwal <ajaya@codeaurora.org>