reset: ath79: add driver Kconfig option

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

Acked-by: Aban Bedel <albeu@free.fr>
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 7dfe8d8..9da0507 100644
--- a/drivers/reset/Kconfig
+++ b/drivers/reset/Kconfig
@@ -14,6 +14,13 @@
 
 if RESET_CONTROLLER
 
+config RESET_ATH79
+	bool "AR71xx Reset Driver" if COMPILE_TEST
+	default ATH79
+	help
+	  This enables the ATH79 reset controller driver that supports the
+	  AR71xx SoC reset controller.
+
 config RESET_OXNAS
 	bool