drm/amdgpu: add HWID of SDMA instance 2 and 3

They are missed.

Acked-by: Christian König <[e-mail]>
Signed-off-by: Guchun Chen <[e-mail]>
Signed-off-by: Alex Deucher <[e-mail]>

drivers/gpu/drm/amd/include/soc15_hw_ip.h

···
 #define L1IMU15_HWID                                      65
 #define WAFLC_HWID                                        66
 #define FCH_USB_PD_HWID                                   67
+#define SDMA2_HWID                                        68
+#define SDMA3_HWID                                        69
 #define PCIE_HWID                                         70
 #define PCS_HWID                                          80
 #define DDCL_HWID                                         89