drm/amd/display: Pass correct number for gamma entries

This was broken by "implement DXGI Gamma Ramps"

Signed-off-by: Harry Wentland <harry.wentland@amd.com>
Reviewed-by: Andrey Grodzovsky <Andrey.Grodzovsky@amd.com>
Acked-by: Harry Wentland <Harry.Wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c

@@ -1890,7 +1890,8 @@ static void fill_gamma_from_crtc_state(
 		return;
 	}
 
-	gamma->type = GAMMA_RGB_256_ENTRIES;
+	gamma->type = GAMMA_RGB_256;
+	gamma->num_entries = GAMMA_RGB_256_ENTRIES;
 	for (i = 0; i < GAMMA_RGB_256_ENTRIES; i++) {
 		gamma->entries.red[i] = dal_fixed31_32_from_int(lut[i].red);
 		gamma->entries.green[i] = dal_fixed31_32_from_int(lut[i].green);