gpio: pxa: Add COMPILE_TEST support

Add COMPILE_TEST support to the PXA GPIO driver for better compile
testing coverage.
Signed-off-by: NTiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: NBartosz Golaszewski <bgolaszewski@baylibre.com>

drivers/gpio/Kconfig

@@ -439,7 +439,7 @@ config GPIO_PMIC_EIC_SPRD
 
 config GPIO_PXA
 	bool "PXA GPIO support"
-	depends on ARCH_PXA || ARCH_MMP
+	depends on ARCH_PXA || ARCH_MMP || COMPILE_TEST
 	help
 	  Say yes here to support the PXA GPIO device