usb: gadget/imx-udc: fix interrupt name again

Commit 06c3859f (usb: gadget/imx-udc: remove usage of deprecated symbol
USBD_INT0) was a bit precipitant because the name used instead didn't
match the usual naming scheme for irqs on arm/imx.  I renamed the irq to
the right name in e0830004 (ARM: imx: dynamically allocate imx_udc
device) when 06c3859f didn't hit Linus' tree, so I missed to add a
compat #define.

This patch allows compiling imx_udc.c with and without e0830004.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>