Since the type of data_size is uint32_t, adev->umsch_mm.data_size - 1 >> 16 >> 16 is 0
regardless of the values of its operands

So removing the operations upper_32_bits and lower_32_bits.
Signed-off-by: Jesse Zhang <Jesse.Zhang@amd.com>
Suggested-by: Tim Huang <Tim.Huang@amd.com>
Reviewed-by: Tim Huang <Tim.Huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>