soc: versatile: enable compile testing

Enable compile testing for broader build coverage.  None of the drivers
use anything from "asm", so code should build everywhere.
CONFIG_PLAT_VERSATILE is being selected by driver dependencies
(CONFIG_ARCH_INTEGRATOR and CONFIG_ARCH_REALVIEW), so directory can be
always added to Makefile targets without impacting other configurations.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/20240825-soc-dev-fixes-v1-4-ff4b35abed83@linaro.orgSigned-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/soc/Makefile

@@ -32,5 +32,5 @@ obj-y				+= sunxi/
 obj-$(CONFIG_ARCH_TEGRA)	+= tegra/
 obj-y				+= ti/
 obj-$(CONFIG_ARCH_U8500)	+= ux500/
-obj-$(CONFIG_PLAT_VERSATILE)	+= versatile/
+obj-y				+= versatile/
 obj-y				+= xilinx/

drivers/soc/versatile/Kconfig

@@ -4,7 +4,7 @@
 #
 config SOC_INTEGRATOR_CM
 	bool "SoC bus device for the ARM Integrator platform core modules"
-	depends on ARCH_INTEGRATOR
+	depends on ARCH_INTEGRATOR || COMPILE_TEST
 	select SOC_BUS
 	help
 	  Include support for the SoC bus on the ARM Integrator platform
@@ -13,7 +13,7 @@ config SOC_INTEGRATOR_CM
 
 config SOC_REALVIEW
 	bool "SoC bus device for the ARM RealView platforms"
-	depends on ARCH_REALVIEW
+	depends on ARCH_REALVIEW || COMPILE_TEST
 	select SOC_BUS
 	help
 	  Include support for the SoC bus on the ARM RealView platforms