802.15.4/6LowPan: Import fixes from net-next and adjust adf7242 accordingly

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
drivers/net/ieee802154/adf7242.c: update

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
drivers/net/ieee802154/adf7242.c: Use devm_request_threaded_irq

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>