drm/amd/display/dc/core/dc_link_dp: Move DP_VGA_LVDS_CONVERTER_ID_{2, 3} to where they're used

This patch fixes >200 warnings.

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

drivers/gpu/drm/amd/amdgpu/../display/include/ddc_service_types.h:123:22: warning: ‘DP_VGA_LVDS_CONVERTER_ID_3’ defined but not used [-Wunused-const-variable=]
123 | static const uint8_t DP_VGA_LVDS_CONVERTER_ID_3[] = "dnomlA";
| ^~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/include/ddc_service_types.h:121:22: warning: ‘DP_VGA_LVDS_CONVERTER_ID_2’ defined but not used [-Wunused-const-variable=]
121 | static const uint8_t DP_VGA_LVDS_CONVERTER_ID_2[] = "sivarT";

NB: Repeated ~100 times - snipped for brevity

Cc: Harry Wentland <[e-mail]>
Cc: Leo Li <[e-mail]>
Cc: Alex Deucher <[e-mail]>
Cc: "Christian König" <[e-mail]>
Cc: David Airlie <[e-mail]>
Cc: Daniel Vetter <[e-mail]>
Cc: [e-mail]
Cc: [e-mail]
Signed-off-by: Lee Jones <[e-mail]>
Signed-off-by: Alex Deucher <[e-mail]>

drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c

···
 #include "dc_dmub_srv.h"
 #include "dce/dmub_hw_lock_mgr.h"
 
+/*Travis*/
+static const uint8_t DP_VGA_LVDS_CONVERTER_ID_2[] = "sivarT";
+/*Nutmeg*/
+static const uint8_t DP_VGA_LVDS_CONVERTER_ID_3[] = "dnomlA";
+
 #define DC_LOGGER \
 	link->ctx->logger
 #define DC_TRACE_LEVEL_MESSAGE(...) /* do nothing */

drivers/gpu/drm/amd/display/include/ddc_service_types.h

···
 	uint8_t aud_del_ins3;/* DPCD 0002Dh */
 };
 
-/*Travis*/
-static const uint8_t DP_VGA_LVDS_CONVERTER_ID_2[] = "sivarT";
-/*Nutmeg*/
-static const uint8_t DP_VGA_LVDS_CONVERTER_ID_3[] = "dnomlA";
 /*DP to Dual link DVI converter*/
 static const uint8_t DP_DVI_CONVERTER_ID_4[] = "m2DVIa";
 static const uint8_t DP_DVI_CONVERTER_ID_5[] = "3393N2";