drm/i915: Make intel_dp_process_phy_request() static

intel_dp_process_phy_request() has no business being externally
visible. Make it static.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200929233449.32323-4-ville.syrjala@linux.intel.comReviewed-by: Imre Deak <imre.deak@intel.com>

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

@@ -5562,7 +5562,7 @@ intel_dp_autotest_phy_ddi_enable(struct intel_dp *intel_dp, uint8_t lane_cnt)
 		       trans_ddi_func_ctl_value);
 }
 
-void intel_dp_process_phy_request(struct intel_dp *intel_dp)
+static void intel_dp_process_phy_request(struct intel_dp *intel_dp)
 {
 	struct drm_dp_phy_test_params *data =
 		&intel_dp->compliance.test_data.phytest;

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

@@ -123,7 +123,6 @@ void intel_read_dp_sdp(struct intel_encoder *encoder,
 		       struct intel_crtc_state *crtc_state,
 		       unsigned int type);
 bool intel_digital_port_connected(struct intel_encoder *encoder);
-void intel_dp_process_phy_request(struct intel_dp *intel_dp);
 
 static inline unsigned int intel_dp_unused_lane_mask(int lane_count)
 {