drm/amdgpu: add DP audio support for si dce6 (v3)

v2: refine dce_v6_0_audio_endpt_wreg() and unify inconsistent method names
v3: fix num_pins for tahiti, pitcairn, verde and oland
Signed-off-by: Xiaojie Yuan <Xiaojie.Yuan@amd.com>
Reviewed-by: Edward O'Callaghan <funfunctor@folklore1984.net>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Junwei Zhang <Jerry.Zhang@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/include/asic_reg/dce/dce_6_0_sh_mask.h

@@ -906,6 +906,8 @@
 #define AZALIA_F0_CODEC_ENDPOINT_DATA__AZALIA_ENDPOINT_REG_DATA__SHIFT 0x00000000
 #define AZALIA_F0_CODEC_ENDPOINT_INDEX__AZALIA_ENDPOINT_REG_INDEX_MASK 0x000000ffL
 #define AZALIA_F0_CODEC_ENDPOINT_INDEX__AZALIA_ENDPOINT_REG_INDEX__SHIFT 0x00000000
+#define AZALIA_F0_CODEC_ENDPOINT_INDEX__AZALIA_ENDPOINT_REG_WRITE_EN_MASK 0x00000100L
+#define AZALIA_F0_CODEC_ENDPOINT_INDEX__AZALIA_ENDPOINT_REG_WRITE_EN__SHIFT 0x00000008
 #define AZALIA_F0_CODEC_FUNCTION_CONTROL_CONVERTER_SYNCHRONIZATION__CONVERTER_SYNCHRONIZATION_MASK 0x0000003fL
 #define AZALIA_F0_CODEC_FUNCTION_CONTROL_CONVERTER_SYNCHRONIZATION__CONVERTER_SYNCHRONIZATION__SHIFT 0x00000000
 #define AZALIA_F0_CODEC_FUNCTION_CONTROL_POWER_STATE__CLKSTOPOK_MASK 0x00000200L