Base on datasheet,
    the part number is corresponding to bit 0 and 1 of the part info reg.
Signed-off-by: Mia Lin <mimi05633@gmail.com>
Link: https://lore.kernel.org/r/20240311013405.3398823-2-mimi05633@gmail.comSigned-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>