fsi: i2cr-scom: Convert to fsi bus probe mechanism

fsi: i2cr-scom: Convert to fsi bus probe mechanism

The fsi bus got a dedicated probe and remove callback. Make use of them.
This fixes a runtime warning about the driver needing to be converted to
the bus methods.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com>
Acked-by: Eddie James <eajames@linux.ibm.com>
Link: https://patch.msgid.link/694a7d077316c3e2883a8410eade67cd578ee556.1765279318.git.u.kleine-koenig@baylibre.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>