drm/i915/gmbus: move GPIO enum to gmbus

The GPIO enum is only used in intel_gmbus.c, hide it there.
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/3c386ce08d7d53a45c14c2e7519e4cc78a8161be.1667383630.git.jani.nikula@intel.com

drivers/gpu/drm/i915/display/intel_display.h

@@ -61,24 +61,6 @@ struct intel_remapped_info;
 struct intel_rotation_info;
 struct pci_dev;
 
-enum i915_gpio {
-	GPIOA,
-	GPIOB,
-	GPIOC,
-	GPIOD,
-	GPIOE,
-	GPIOF,
-	GPIOG,
-	GPIOH,
-	__GPIOI_UNUSED,
-	GPIOJ,
-	GPIOK,
-	GPIOL,
-	GPIOM,
-	GPION,
-	GPIOO,
-};
-
 /*
  * Keep the pipe enum values fixed: the code assumes that PIPE_A=0, the
  * rest have consecutive values and match the enum values of transcoders

drivers/gpu/drm/i915/display/intel_gmbus.c

@@ -49,9 +49,27 @@ struct intel_gmbus {
 	struct drm_i915_private *i915;
 };
 
+enum gmbus_gpio {
+	GPIOA,
+	GPIOB,
+	GPIOC,
+	GPIOD,
+	GPIOE,
+	GPIOF,
+	GPIOG,
+	GPIOH,
+	__GPIOI_UNUSED,
+	GPIOJ,
+	GPIOK,
+	GPIOL,
+	GPIOM,
+	GPION,
+	GPIOO,
+};
+
 struct gmbus_pin {
 	const char *name;
-	enum i915_gpio gpio;
+	enum gmbus_gpio gpio;
 };
 
 /* Map gmbus pin pairs to names and registers. */