drm/amdgpu: Fix non-standard format specifiers in 'amdgpu_show_fdinfo'

Fixes the following:

WARNING: %Lu is non-standard C, use %llu
+       seq_printf(m, "drm-client-id:\t%Lu\n", vm->immediate.fence_context);

WARNING: %Ld is non-standard C, use %lld
+               seq_printf(m, "drm-engine-%s:\t%Ld ns\n", amdgpu_ip_name[hw_ip],

Cc: Guchun Chen <guchun.chen@amd.com>
Cc: Christian König <christian.koenig@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Srinivasan Shanmugam <srinivasan.shanmugam@amd.com>
Reviewed-by: Guchun Chen <guchun.chen@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>