i2c: fsi: Convert to fsi bus probe mechanism

i2c: fsi: Convert to fsi bus probe mechanism

The fsi bus got a dedicated probe function. Make use of that. This fixes
a runtime warning about the driver needing to be converted to the bus
probe method.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com>
Reviewed-by: Andi Shyti <andi.shyti@kernel.org>
Acked-by: Eddie James <eajames@linux.ibm.com>
Link: https://patch.msgid.link/d8c27aed45bf3119c08c9772768d675ae2ccc0c3.1765279318.git.u.kleine-koenig@baylibre.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>