usb: ehci: fsl: Update register accessing for arm/arm64 platforms

arm/arm64's io.h doesn't define clrbits32() and clrsetbits_be32(), which
causing compile failure on some Layerscape Platforms (such as LS1021A and
LS2012A which also integrates FSL EHCI controller). So use
ioread32be()/iowrite32be() instead to make it workable on both
powerpc and arm.

Signed-off-by: Ran Wang <ran.wang_1@nxp.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>