drm/gma500: Declare a few functions static

These functions are not used outside of their file scope so can be
declared as static.
Signed-off-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20220322131742.11566-6-patrik.r.jakobsson@gmail.com

drivers/gpu/drm/gma500/gma_display.c

@@ -176,9 +176,9 @@ void gma_crtc_load_lut(struct drm_crtc *crtc)
 	}
 }
 
-int gma_crtc_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green, u16 *blue,
-		       u32 size,
-		       struct drm_modeset_acquire_ctx *ctx)
+static int gma_crtc_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green,
+			      u16 *blue, u32 size,
+			      struct drm_modeset_acquire_ctx *ctx)
 {
 	gma_crtc_load_lut(crtc);
 
@@ -323,10 +323,9 @@ void gma_crtc_dpms(struct drm_crtc *crtc, int mode)
 	REG_WRITE(DSPARB, 0x3F3E);
 }
 
-int gma_crtc_cursor_set(struct drm_crtc *crtc,
-			struct drm_file *file_priv,
-			uint32_t handle,
-			uint32_t width, uint32_t height)
+static int gma_crtc_cursor_set(struct drm_crtc *crtc,
+			       struct drm_file *file_priv, uint32_t handle,
+			       uint32_t width, uint32_t height)
 {
 	struct drm_device *dev = crtc->dev;
 	struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
@@ -439,7 +438,7 @@ int gma_crtc_cursor_set(struct drm_crtc *crtc,
 	return ret;
 }
 
-int gma_crtc_cursor_move(struct drm_crtc *crtc, int x, int y)
+static int gma_crtc_cursor_move(struct drm_crtc *crtc, int x, int y)
 {
 	struct drm_device *dev = crtc->dev;
 	struct gma_crtc *gma_crtc = to_gma_crtc(crtc);

drivers/gpu/drm/gma500/psb_drv.c

@@ -100,7 +100,7 @@ static const struct drm_ioctl_desc psb_ioctls[] = {
  *
  *	Soft reset the graphics engine and then reload the necessary registers.
  */
-void psb_spank(struct drm_psb_private *dev_priv)
+static void psb_spank(struct drm_psb_private *dev_priv)
 {
 	PSB_WSGX32(_PSB_CS_RESET_BIF_RESET | _PSB_CS_RESET_DPM_RESET |
 		_PSB_CS_RESET_TA_RESET | _PSB_CS_RESET_USE_RESET |