reset: pistachio: add driver Kconfig option

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

Cc: Damien Horsley <Damien.Horsley@imgtec.com>
Acked-by: James Hartley <james.hartley@imgtec.com>
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 3fa6afe..8bb1d87 100644
--- a/drivers/reset/Kconfig
+++ b/drivers/reset/Kconfig
@@ -42,6 +42,12 @@
 config RESET_OXNAS
 	bool
 
+config RESET_PISTACHIO
+	bool "Pistachio Reset Driver" if COMPILE_TEST
+	default MACH_PISTACHIO
+	help
+	  This enables the reset driver for ImgTec Pistachio SoCs.
+
 config TI_SYSCON_RESET
 	tristate "TI SYSCON Reset Driver"
 	depends on HAS_IOMEM