drm/radeon: Add init interrupt kfd->kgd interface

This patch adds a new interface function to the kfd->kgd interface.
The function is kgd_init_interrupts() and its function is to
initialize a pipe's interrupts.

The function currently enables the timestamp interrupt and the
bad opcode interrupt.

Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
diff --git a/drivers/gpu/drm/radeon/cik_reg.h b/drivers/gpu/drm/radeon/cik_reg.h
index f667347d..0ec5d53 100644
--- a/drivers/gpu/drm/radeon/cik_reg.h
+++ b/drivers/gpu/drm/radeon/cik_reg.h
@@ -149,6 +149,8 @@
 
 #define KFD_CIK_SDMA_QUEUE_OFFSET		0x200
 
+#define CPC_INT_CNTL					0xC2D0
+
 #define CP_HQD_IQ_RPTR					0xC970u
 #define AQL_ENABLE					(1U << 0)
 #define SDMA0_RLC0_RB_CNTL				0xD400u