net: sparx5: move calendar initialization to probe

net: sparx5: move calendar initialization to probe

Move the calendar initialization from sparx5_start() to probe() by
creating a new sparx5_calendar_init() wrapper function that calls both
sparx5_config_auto_calendar() and sparx5_config_dsm_calendar().
Calendar initialization does not require cleanup.

Also, make the individual calendar config functions static since they
are now only called from within sparx5_calendar.c.

Signed-off-by: Daniel Machon <daniel.machon@microchip.com>
Link: https://patch.msgid.link/20260227-sparx5-init-deinit-v2-5-10ba54ccf005@microchip.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>