drm/i915/tc: demote a kernel-doc comment to a regular comment

There's not much point in a static work function having a kernel-doc
comment. Just clean it up and make it a regular comment.

This fixes the kernel-doc warnings:

drivers/gpu/drm/i915/display/intel_tc.c:1370: warning: Function
parameter or member 'work' not described in
'intel_tc_port_disconnect_phy_work'

drivers/gpu/drm/i915/display/intel_tc.c:1370: warning: Excess function
parameter 'dig_port' description in 'intel_tc_port_disconnect_phy_work'
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Vinod Govindapillai <vinod.govindapillai@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230405104142.766598-1-jani.nikula@intel.com

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

@@ -1358,10 +1358,7 @@ void intel_tc_port_lock(struct intel_digital_port *dig_port)
 	__intel_tc_port_lock(to_tc_port(dig_port), 1);
 }
 
-/**
- * intel_tc_port_disconnect_phy_work: disconnect TypeC PHY from display port
- * @dig_port: digital port
- *
+/*
  * Disconnect the given digital port from its TypeC PHY (handing back the
  * control of the PHY to the TypeC subsystem). This will happen in a delayed
  * manner after each aux transactions and modeset disables.