memory: fsl_ifc: 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 FSL_SOC, ARCH_LAYERSCAPE or SOC_LS1021A
enabled.

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

Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>

drivers/memory/Kconfig

@@ -116,7 +116,8 @@ config FSL_CORENET_CF
 
 config FSL_IFC
 	bool
-	depends on FSL_SOC || ARCH_LAYERSCAPE || SOC_LS1021A
+	depends on FSL_SOC || ARCH_LAYERSCAPE || SOC_LS1021A || COMPILE_TEST
+	depends on HAS_IOMEM
 
 config JZ4780_NEMC
 	bool "Ingenic JZ4780 SoC NEMC driver"