clk: gpio-gate: Ensure gpiod_ APIs are prototyped

The gpio-gate clock uses the gpiod_ APIs but does not directly include the
header for them causing build failures in some configurations including ARM
allnoconfig. Include the header directly.
Signed-off-by: Mark Brown <broonie@kernel.org>
Acked-by: Jyri Sarha <jsarha@ti.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>

drivers/clk/clk-gpio-gate.c

@@ -13,6 +13,7 @@
 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
 #include <linux/of_gpio.h>
 #include <linux/err.h>
 #include <linux/device.h>