rtc: imxdi: Soften dependencies for improved compile coverage

The driver compiles fine on x86_64, so soften the dependencies to
ARCH_MXC || COMPILE_TEST.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/20231002080529.2535610-2-u.kleine-koenig@pengutronix.deSigned-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

drivers/rtc/Kconfig

@@ -1351,7 +1351,7 @@ config RTC_DRV_DIGICOLOR
 
 config RTC_DRV_IMXDI
 	tristate "Freescale IMX DryIce Real Time Clock"
-	depends on ARCH_MXC
+	depends on ARCH_MXC || COMPILE_TEST
 	depends on OF
 	help
 	   Support for Freescale IMX DryIce RTC