drm/amd/display: Move define to the proper header

[Why & How]
DCN3_16_MIN_COMPBUF_SIZE_KB is defined in the dcn316_resource.c file.
This header fit better in the dcn31_fpu.h together with similar defines.
Acked-by: Wayne Lin <wayne.lin@amd.com>
Signed-off-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dml/dcn31/dcn31_fpu.h

@@ -30,6 +30,7 @@
 #define DCN3_15_DEFAULT_DET_SIZE 192
 #define DCN3_15_MIN_COMPBUF_SIZE_KB 128
 #define DCN3_16_DEFAULT_DET_SIZE 192
+#define DCN3_16_MIN_COMPBUF_SIZE_KB 128
 
 void dcn31_zero_pipe_dcc_fraction(display_e2e_pipe_params_st *pipes,
 				  int pipe_cnt);

drivers/gpu/drm/amd/display/dc/resource/dcn316/dcn316_resource.c

@@ -125,7 +125,6 @@
 #include "link_enc_cfg.h"
 
 #define DCN3_16_MAX_DET_SIZE 384
-#define DCN3_16_MIN_COMPBUF_SIZE_KB 128
 #define DCN3_16_CRB_SEGMENT_SIZE_KB 64
 
 enum dcn31_clk_src_array_id {