drm/amdgpu: Fix ARM compilation warning

Fix this ARM warning:

drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c:664:35: warning: format '%ld'
expects argument of type 'long int', but argument 4 has type 'size_t' {aka
'unsigned int'} [-Wformat=]

Cc: Alex Deucher <Alexander.Deucher@amd.com>
Cc: kbuild-all@lists.01.org
Cc: linux-kernel@vger.kernel.org
Reported-by: kernel test robot <lkp@intel.com>
Fixes: a6c40b17 ("drm/amdgpu: Show IP discovery in sysfs")
Signed-off-by: Luben Tuikov <luben.tuikov@amd.com>
Acked-by: Alex Deucher <Alexander.Deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -668,7 +668,7 @@ static int amdgpu_discovery_sysfs_ips(struct amdgpu_device *adev,
 			    le16_to_cpu(ip->hw_id) != ii)
 				goto next_ip;
 
-			DRM_DEBUG("match:%d @ ip_offset:%ld", ii, ip_offset);
+			DRM_DEBUG("match:%d @ ip_offset:%zu", ii, ip_offset);
 
 			/* We have a hw_id match; register the hw
 			 * block if not yet registered.