iicsmb: Request the bus recursively in bread()

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