drm/amdgpu: increase max instance number for hw ip

max instance number is 6 for navi10 and 7 for navi14, and we increase the
reg_offset array size to avoid out-of-bound access
Signed-off-by: Xiaojie Yuan <xiaojie.yuan@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -731,7 +731,7 @@ enum amd_hw_ip_block_type {
 	MAX_HWIP
 };
 
-#define HWIP_MAX_INSTANCE	6
+#define HWIP_MAX_INSTANCE	7
 
 struct amd_powerplay {
 	void *pp_handle;