drm/sitronix/st7571-i2c: Fix encoder callbacks function names

It seems the driver took some inspiration from ssd130x and some of the
functions (encoder callbacks) were not renamed to use a st7571_ prefix.

Reviewed-by: Marcus Folkesson <marcus.folkesson@gmail.com>
Link: https://lore.kernel.org/r/20250715110411.448343-2-javierm@redhat.com
Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>

Author: martinezjavier

drivers/gpu/drm/sitronix/st7571-i2c.c

@@ -550,8 +550,8 @@ static const struct drm_crtc_funcs st7571_crtc_funcs = {
  * Encoder
  */
 
-static void ssd130x_encoder_atomic_enable(struct drm_encoder *encoder,
-					  struct drm_atomic_state *state)
+static void st7571_encoder_atomic_enable(struct drm_encoder *encoder,
+					 struct drm_atomic_state *state)
 {
 	struct drm_device *drm = encoder->dev;
 	struct st7571_device *st7571 = drm_to_st7571(drm);
@@ -565,8 +565,8 @@ static void ssd130x_encoder_atomic_enable(struct drm_encoder *encoder,
 	st7571_send_command_list(st7571, &command, 1);
 }
 
-static void ssd130x_encoder_atomic_disable(struct drm_encoder *encoder,
-					   struct drm_atomic_state *state)
+static void st7571_encoder_atomic_disable(struct drm_encoder *encoder,
+					  struct drm_atomic_state *state)
 {
 	struct drm_device *drm = encoder->dev;
 	struct st7571_device *st7571 = drm_to_st7571(drm);
@@ -581,8 +581,8 @@ static const struct drm_encoder_funcs st7571_encoder_funcs = {
 };
 
 static const struct drm_encoder_helper_funcs st7571_encoder_helper_funcs = {
-	.atomic_enable = ssd130x_encoder_atomic_enable,
-	.atomic_disable = ssd130x_encoder_atomic_disable,
+	.atomic_enable = st7571_encoder_atomic_enable,
+	.atomic_disable = st7571_encoder_atomic_disable,
 };
 
 /*