ata: pata_imx: add compile test support

Add Kconfig dependendy on COMPILE_TEST to allow compile tests with
configs that do not enable ARCH_MXC.
Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>

drivers/ata/Kconfig

@@ -748,7 +748,7 @@ config PATA_ICSIDE
 
 config PATA_IMX
 	tristate "PATA support for Freescale iMX"
-	depends on ARCH_MXC
+	depends on ARCH_MXC || COMPILE_TEST
 	select PATA_TIMINGS
 	help
 	  This option enables support for the PATA host available on Freescale