usb: cdns3: drd: don't call drd_update_mode in drd_init()
At drd_init(), 'desired_dr_mode' is not yet correctly set
based on enabled drivers and dr_mode in DT. So don't call
drd_update_mode() from here.
Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>