drm/amd/display/dc/bios/command_table_helper: Fix kernel-doc formatting

Fixes the following W=1 kernel build warning(s):

 drivers/gpu/drm/amd/amdgpu/../display/dc/bios/command_table_helper.c:131: warning: Function parameter or member 't' not described in 'dal_cmd_table_helper_transmitter_bp_to_atom'

Cc: Harry Wentland <harry.wentland@amd.com>
Cc: Leo Li <sunpeng.li@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: "Christian König" <christian.koenig@amd.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Mauro Rossi <issor.oruam@gmail.com>
Cc: amd-gfx@lists.freedesktop.org
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/bios/command_table_helper.c

@@ -114,18 +114,14 @@ bool dal_cmd_table_helper_controller_id_to_atom(
 }
 
 /**
-* translate_transmitter_bp_to_atom
-*
-* @brief
-*  Translate the Transmitter to the corresponding ATOM BIOS value
-*
-* @param
-*   input transmitter
-*   output digitalTransmitter
-*    // =00: Digital Transmitter1 ( UNIPHY linkAB )
-*    // =01: Digital Transmitter2 ( UNIPHY linkCD )
-*    // =02: Digital Transmitter3 ( UNIPHY linkEF )
-*/
+ * translate_transmitter_bp_to_atom - Translate the Transmitter to the
+ *                                    corresponding ATOM BIOS value
+ * @t: transmitter
+ * returns: output digitalTransmitter
+ *    // =00: Digital Transmitter1 ( UNIPHY linkAB )
+ *    // =01: Digital Transmitter2 ( UNIPHY linkCD )
+ *    // =02: Digital Transmitter3 ( UNIPHY linkEF )
+ */
 uint8_t dal_cmd_table_helper_transmitter_bp_to_atom(
 	enum transmitter t)
 {