drm/amdgpu: add DMUB trace event IRQ source define

[Why & How]
We use DMCUB outbox0 interrupt to log DMCUB trace buffer events
as Linux kernel traces, so need to add some irq source related
defination in the header files;
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Leo (Hanghong) Ma <hanghong.ma@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu.h

@@ -908,6 +908,7 @@ struct amdgpu_device {
 	struct amdgpu_irq_src		vupdate_irq;
 	struct amdgpu_irq_src		pageflip_irq;
 	struct amdgpu_irq_src		hpd_irq;
+	struct amdgpu_irq_src		dmub_trace_irq;
 
 	/* rings */
 	u64				fence_context;

drivers/gpu/drm/amd/include/ivsrcid/dcn/irqsrcs_dcn_1_0.h

@@ -1130,5 +1130,7 @@
 #define DCN_1_0__SRCID__HUBP6_FLIP_AWAY_INTERRUPT	0x63	// Flip_away interrupt is generated when all data for old surface is returned and old surface is not used again after the surface flip.HUBP6_IHC_FLIP_AWAY_INTERRUPT	DISP_INTERRUPT_STATUS_CONTINUE17	Level / Pulse
 #define DCN_1_0__SRCID__HUBP7_FLIP_AWAY_INTERRUPT	0x64	// Flip_away interrupt is generated when all data for old surface is returned and old surface is not used again after the surface flip.HUBP7_IHC_FLIP_AWAY_INTERRUPT	DISP_INTERRUPT_STATUS_CONTINUE17	Level / Pulse
 
+#define DCN_1_0__SRCID__DMCUB_OUTBOX_HIGH_PRIORITY_READY_INT       0x68
+#define DCN_1_0__CTXID__DMCUB_OUTBOX_HIGH_PRIORITY_READY_INT       6
 
 #endif // __IRQSRCS_DCN_1_0_H__