Input: w90p910_ts - use clk API

Now that clk API is available on ARM we can use it in the driver.

Signed-off-by: Wan ZongShun <mcuos.com@gmail.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
index a66e50a..1c05b32 100644
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -498,6 +498,7 @@
 
 config TOUCHSCREEN_W90X900
 	tristate "W90P910 touchscreen driver"
+	depends on HAVE_CLK
 	help
 	  Say Y here if you have a W90P910 based touchscreen.