memory: jz4780-nemc: Allow selection of this driver when COMPILE_TEST=y

It just makes maintainers' life easier by allowing them to compile-test
this driver without having MACH_JZ4780 enabled.

We also need to add a dependency on HAS_IOMEM to make sure the
driver compiles correctly.

Signed-off-by: Boris Brezillon <[email protected]>
Acked-by: Paul Burton <[email protected]>
Signed-off-by: Miquel Raynal <[email protected]>

drivers/memory/Kconfig

@@ -122,7 +122,8 @@ config FSL_IFC
 config JZ4780_NEMC
 	bool "Ingenic JZ4780 SoC NEMC driver"
 	default y
-	depends on MACH_JZ4780
+	depends on MACH_JZ4780 || COMPILE_TEST
+	depends on HAS_IOMEM
 	help
 	  This driver is for the NAND/External Memory Controller (NEMC) in
 	  the Ingenic JZ4780. This controller is used to handle external