drm/amdgpu: Replace invalid device ID with a valid device ID

Initializes Powertune data for a specific Hawaii card by fixing what
looks like a typo in the code. The device ID 66B1 is not a supported
device ID for this driver, and is not mentioned elsewhere. 67B1 is a
valid device ID, and is a Hawaii Pro GPU.

I have tested on my R9 390 which has device ID 67B1, and it works
fine without problems.
Signed-off-by: Sandeep Raghuraman <sandy.8925@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/powerplay/smumgr/ci_smumgr.c

@@ -239,7 +239,7 @@ static void ci_initialize_power_tune_defaults(struct pp_hwmgr *hwmgr)
 
 	switch (dev_id) {
 	case 0x67BA:
-	case 0x66B1:
+	case 0x67B1:
 		smu_data->power_tune_defaults = &defaults_hawaii_pro;
 		break;
 	case 0x67B8: