i3c: mipi-i3c-hci: Switch to lower_32_bits()/upper_32_bits() helpers

Rather than having own lo32()/hi32() helpers for dealing with 32-bit and
64-bit build targets switch to generic lower_32_bits()/upper_32_bits()
helpers.

Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Link: https://lore.kernel.org/r/20240628131559.502822-1-jarkko.nikula@linux.intel.com


Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>