staging: emxx_udc: Allow for building on !ARM

Currently the module can only be test built on ARM, although it seems to
build fine on x86. Change this to allow for broader test coverage.
Signed-off-by: Alex Dewar <alex.dewar90@gmail.com>
Link: https://lore.kernel.org/r/20200818151133.583382-1-alex.dewar90@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/emxx_udc/Kconfig

 # SPDX-License-Identifier: GPL-2.0
 config USB_EMXX
 	tristate "EMXX USB Function Device Controller"
-	depends on USB_GADGET && (ARCH_RENESAS || (ARM && COMPILE_TEST))
+	depends on USB_GADGET && (ARCH_RENESAS || COMPILE_TEST)
 	help
 	   The Emma Mobile series of SoCs from Renesas Electronics and
 	   former NEC Electronics include USB Function hardware.