soc: imx: Enable compile testing of IMX_SCU_SOC

IMX_SCU_SOC can be compile tested to increase build coverage.
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

drivers/soc/imx/Kconfig

@@ -10,7 +10,7 @@ config IMX_GPCV2_PM_DOMAINS
 
 config IMX_SCU_SOC
 	bool "i.MX System Controller Unit SoC info support"
-	depends on IMX_SCU
+	depends on IMX_SCU || COMPILE_TEST
 	select SOC_BUS
 	help
 	  If you say yes here you get support for the NXP i.MX System