drm/i915/mst: un-inline intel_dp_mst_encoder_active_links()

Avoid including the intel_drv.h mega header from other header files to
make further header cleanup easier.
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/ae8f7a9514a9e952e1e0dba411aeb42293d1e183.1565085691.git.jani.nikula@intel.com

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

@@ -631,6 +631,12 @@ intel_dp_create_fake_mst_encoders(struct intel_digital_port *intel_dig_port)
 	return true;
 }
 
+int
+intel_dp_mst_encoder_active_links(struct intel_digital_port *intel_dig_port)
+{
+	return intel_dig_port->dp.active_mst_links;
+}
+
 int
 intel_dp_mst_encoder_init(struct intel_digital_port *intel_dig_port, int conn_base_id)
 {

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

@@ -6,15 +6,10 @@
 #ifndef __INTEL_DP_MST_H__
 #define __INTEL_DP_MST_H__
 
-#include "intel_drv.h"
+struct intel_digital_port;
 
 int intel_dp_mst_encoder_init(struct intel_digital_port *intel_dig_port, int conn_id);
 void intel_dp_mst_encoder_cleanup(struct intel_digital_port *intel_dig_port);
-static inline int
-intel_dp_mst_encoder_active_links(struct intel_digital_port *intel_dig_port)
-{
-	return intel_dig_port->dp.active_mst_links;
-}
-
+int intel_dp_mst_encoder_active_links(struct intel_digital_port *intel_dig_port);
 
 #endif /* __INTEL_DP_MST_H__ */