pinctrl: sprd: Restrict PINCTRL_SPRD to ARCH_SPRD or COMPILE_TEST

The Spreadtrum pinctrl drivers are only useful when building for a
Spreadtrum platform.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
diff --git a/drivers/pinctrl/sprd/Kconfig b/drivers/pinctrl/sprd/Kconfig
index d24ae01..bc7f3fa 100644
--- a/drivers/pinctrl/sprd/Kconfig
+++ b/drivers/pinctrl/sprd/Kconfig
@@ -4,11 +4,12 @@
 
 config PINCTRL_SPRD
 	bool "Spreadtrum pinctrl driver"
+	depends on OF
+	depends on ARCH_SPRD || COMPILE_TEST
 	select PINMUX
 	select PINCONF
 	select GENERIC_PINCONF
 	select GENERIC_PINMUX_FUNCTIONS
-	depends on OF
 	help
 	  Say Y here to enable Spreadtrum pinctrl driver