wifi: wilc1000: validate chip id during bus probe

Previously, the driver created a net device (typically wlan0) as soon
as the module was loaded.  This commit changes the driver to follow
normal Linux convention of creating the net device only when bus
probing detects a supported chip.

Signed-off-by: David Mosberger-Tang <davidm@egauge.net>
Tested-By: Alexis Lothoré <alexis.lothore@bootlin.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://msgid.link/20240212202057.3468714-1-davidm@egauge.net