power: supply: bq27xxx: Add bulk transfer bus methods
Declare bus.write/read_bulk/write_bulk().
Add I2C write/read_bulk/write_bulk() to implement the above.
Add bq27xxx_write/read_block/write_block() helpers to call the above.
Signed-off-by: Matt Ranostay <matt@ranostay.consulting> Signed-off-by: Liam Breck <kernel@networkimprov.net> Acked-by: "Andrew F. Davis" <afd@ti.com> Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>