reset: sunxi: add driver Kconfig option

Visible only if COMPILE_TEST is enabled, this allows to include the
driver in build tests.

Reviewed-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
diff --git a/drivers/reset/Kconfig b/drivers/reset/Kconfig
index afcbb99..7f748af 100644
--- a/drivers/reset/Kconfig
+++ b/drivers/reset/Kconfig
@@ -60,6 +60,12 @@
 	help
 	  This enables the RCC reset controller driver for STM32 MCUs.
 
+config RESET_SUNXI
+	bool "Allwinner SoCs Reset Driver" if COMPILE_TEST && !ARCH_SUNXI
+	default ARCH_SUNXI
+	help
+	  This enables the reset driver for Allwinner SoCs.
+
 config TI_SYSCON_RESET
 	tristate "TI SYSCON Reset Driver"
 	depends on HAS_IOMEM