net: ieee802154: ca8210: Call _xmit_error() when a transmission fails

ieee802154_xmit_error() is the right helper to call when a transmission
has failed. Let's use it instead of open-coding it.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Acked-by: Alexander Aring <aahringo@redhat.com>
Link: https://lore.kernel.org/r/20220407100903.1695973-11-miquel.raynal@bootlin.com


Signed-off-by: Stefan Schmidt <stefan@datenfreihafen.org>