iicsmb: Request the bus recursively in bread()

ipmi_ssif will smbus_request_bus() to do multiple smbus requests
(which requests the iicbus), and then here in bread() we also need to
request the bus because bread() takes multiple transactions.
This causes deadlock as it's waiting for the bus it already has without
IIC_RECURSIVE.

Sponsored by: Ampere Computing LLC
Submitted by: Klara Inc.
Reviewed by: imp
Differential Revision: https://reviews.freebsd.org/D28742