usb: dwc3: msm: Remove dwc3_msm_dump_phy_info() function

Many of these PHY related registers have been moved to PHY drivers and
the controller no longer even accesses them. Furthermore, on newer
platforms, some of these registers don't even exist. Their only
remaining use was to be dumped during erratic error events, however
they do not provide any useful information.
Hence remove their definitions as well as the unneeded
dwc3_msm_dump_phy_info() function.

Change-Id: Ic9792585883a77db9b3e52b6570f59513a85d59c
Signed-off-by: Azhar Shaikh <azhars@codeaurora.org>