drm/amdgpu/dce11: fix audio offset for asics with >7 audio pins

Missing offset in the audio offset array.

Reported-by: Dan Carpenter <[e-mail]>
Signed-off-by: Alex Deucher <[e-mail]>

drivers/gpu/drm/amd/amdgpu/dce_v11_0.c

···
 	AUD4_REGISTER_OFFSET,
 	AUD5_REGISTER_OFFSET,
 	AUD6_REGISTER_OFFSET,
+	AUD7_REGISTER_OFFSET,
 };
 
 static int dce_v11_0_audio_init(struct amdgpu_device *adev)

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

···
 #define AUD3_REGISTER_OFFSET                 (0x17b4 - 0x17a8)
 #define AUD4_REGISTER_OFFSET                 (0x17b8 - 0x17a8)
 #define AUD5_REGISTER_OFFSET                 (0x17bc - 0x17a8)
-#define AUD6_REGISTER_OFFSET                 (0x17c4 - 0x17a8)
+#define AUD6_REGISTER_OFFSET                 (0x17c0 - 0x17a8)
+#define AUD7_REGISTER_OFFSET                 (0x17c4 - 0x17a8)
 
 /* hpd instance offsets */
 #define HPD0_REGISTER_OFFSET                 (0x1898 - 0x1898)