drm/i915/tc: un-inline intel_tc_port_ref_held()

Avoid including the intel_drv.h mega header from other header files to
make further header cleanup easier.

v2: restore the over-eagerly dropped <linux/types.h> (Imre)
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/20190806113700.18816-1-jani.nikula@intel.com

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

@@ -7,6 +7,7 @@
 #include "intel_display.h"
 #include "intel_dp_mst.h"
 #include "intel_tc.h"
+#include "intel_drv.h"
 
 static const char *tc_port_mode_name(enum tc_port_mode mode)
 {
@@ -503,6 +504,12 @@ void intel_tc_port_unlock(struct intel_digital_port *dig_port)
 				      wakeref);
 }
 
+bool intel_tc_port_ref_held(struct intel_digital_port *dig_port)
+{
+	return mutex_is_locked(&dig_port->tc_lock) ||
+	       dig_port->tc_link_refcount;
+}
+
 void intel_tc_port_get_link(struct intel_digital_port *dig_port,
 			    int required_lanes)
 {

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

@@ -9,7 +9,7 @@
 #include <linux/mutex.h>
 #include <linux/types.h>
 
-#include "intel_drv.h"
+struct intel_digital_port;
 
 bool intel_tc_port_connected(struct intel_digital_port *dig_port);
 u32 intel_tc_port_get_lane_mask(struct intel_digital_port *dig_port);
@@ -23,12 +23,7 @@ void intel_tc_port_unlock(struct intel_digital_port *dig_port);
 void intel_tc_port_get_link(struct intel_digital_port *dig_port,
 			    int required_lanes);
 void intel_tc_port_put_link(struct intel_digital_port *dig_port);
-
-static inline int intel_tc_port_ref_held(struct intel_digital_port *dig_port)
-{
-	return mutex_is_locked(&dig_port->tc_lock) ||
-	       dig_port->tc_link_refcount;
-}
+bool intel_tc_port_ref_held(struct intel_digital_port *dig_port);
 
 void intel_tc_port_init(struct intel_digital_port *dig_port, bool is_legacy);