staging: emxx_udc: Change platform dependency to ARCH_RENESAS

Emma Mobile is a Renesas ARM SoC.  Since commit 9b5ba0df ("ARM:
shmobile: Introduce ARCH_RENESAS") is ARCH_RENESAS a more appropriate
platform dependency than the legacy ARCH_SHMOBILE, hence use the
former.

This will allow to drop ARCH_SHMOBILE on ARM in the near future.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/emxx_udc/Kconfig

 config USB_EMXX
 	tristate "EMXX USB Function Device Controller"
- 	depends on USB_GADGET && (ARCH_SHMOBILE || (ARM && COMPILE_TEST))
+	depends on USB_GADGET && (ARCH_RENESAS || (ARM && COMPILE_TEST))
 	help
 	   The Emma Mobile series of SoCs from Renesas Electronics and
 	   former NEC Electronics include USB Function hardware.