dwc3: versal: Move GFLADJ adjustment logic to dwc3-generic-host

dwc3: versal: Move GFLADJ adjustment logic to dwc3-generic-host

USB host driver moved to use "dwc3-generic-host" from old "xhci-dwc3" as
per commit b575e909168c ("usb: dwc3-generic: add a new host driver that
uses the dwc3 core").

Move frame length adjustment functionality of GFLADJ which was added with
commit 6e51fd18863d ("dwc3: versal: Correct the logic for GFLADJ
adjustment") to new "dwc3-generic-host" driver.

Signed-off-by: Ashok Reddy Soma <ashok.reddy.soma@xilinx.com>
Signed-off-by: T Karthik Reddy <t.karthik.reddy@xilinx.com>