wifi: wilc1000: fix driver_handler when committing initial configuration

During firmware initial configuration in wilc_init_fw_config, the special
driver_handler 0 should be used instead of targeting a specific virtual
interface (either 1 or 2)
The issue does not seem to have real consequence (both virtual interfaces
seems to answer correctly to a Add Block Ack request with the Immediate
policy), but lets make everything homogeneous

Signed-off-by: Ajay Singh <ajay.kathat@microchip.com>
Signed-off-by: Alexis Lothoré <alexis.lothore@bootlin.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://msgid.link/20240115-wilc_1000_fixes-v1-2-54d29463a738@bootlin.com