gpio: remove GPIOD_REQUESTED

Remove the define GPIOD_REQUESTED as it is never used
and use BIT() macro for other defines.

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/include/asm-generic/gpio.h b/include/asm-generic/gpio.h
index 05777e6..4064efe 100644
--- a/include/asm-generic/gpio.h
+++ b/include/asm-generic/gpio.h
@@ -117,11 +117,10 @@
 struct gpio_desc {
 	struct udevice *dev;	/* Device, NULL for invalid GPIO */
 	unsigned long flags;
-#define GPIOD_REQUESTED		(1 << 0)	/* Requested/claimed */
-#define GPIOD_IS_OUT		(1 << 1)	/* GPIO is an output */
-#define GPIOD_IS_IN		(1 << 2)	/* GPIO is an input */
-#define GPIOD_ACTIVE_LOW	(1 << 3)	/* value has active low */
-#define GPIOD_IS_OUT_ACTIVE	(1 << 4)	/* set output active */
+#define GPIOD_IS_OUT		BIT(1)	/* GPIO is an output */
+#define GPIOD_IS_IN		BIT(2)	/* GPIO is an input */
+#define GPIOD_ACTIVE_LOW	BIT(3)	/* value has active low */
+#define GPIOD_IS_OUT_ACTIVE	BIT(4)	/* set output active */
 
 	uint offset;		/* GPIO offset within the device */
 	/*