arm: sunxi: add support for DIP detection to CHIP board

Add the extension_board_scan specific function to scan the information
of the EEPROM on one-wire and fill the extension struct.
Add the Kconfig symbol to enable the needs to detect DIPs.

Signed-off-by: Kory Maincent <kory.maincent@bootlin.com>
Reviewed-by: Maxime Ripard <maxime@cerno.tech>
Acked-by: Andre Przywara <andre.przywara@arm.com>