USB: host: Use usb_hcd_platform_shutdown() wherever possible

Most HCD drivers are doing the same thing in their ".shutdown" callback
so it makes sense to use the generic usb_hcd_platform_shutdown()
handler there.

Signed-off-by: Roger Quadros <rogerq@ti.com>
Reviewed-by: Felipe Balbi <balbi@ti.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --cc drivers/usb/host/ehci-grlib.c
Simple merge

diff --cc drivers/usb/host/ehci-mxc.c
Simple merge

diff --cc drivers/usb/host/ehci-omap.c
Simple merge

diff --cc drivers/usb/host/ehci-ppc-of.c
Simple merge

diff --cc drivers/usb/host/ehci-s5p.c
Simple merge

diff --cc drivers/usb/host/ehci-xilinx-of.c
Simple merge

diff --cc drivers/usb/host/ohci-omap3.c
Simple merge

diff --cc drivers/usb/host/ohci-ppc-of.c
Simple merge