drm/amdgpu/smu11: fix firmware version check for vangogh

Was missed in the conversion to IP version checking.

Fixes: af3b89d3 ("drm/amdgpu/smu11.0: convert to IP version checking")
Reviewed-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>