usb: phy: mv-u3d: switch over to writel/readl
usb: phy: mv-u3d: switch over to writel/readl

by removing the _relaxed suffix, we can build
this driver in other architectures.

Signed-off-by: Felipe Balbi <94dddeeef08b001e003cce128ddc162a4e2c6cd2@ti.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs