net: ibm: emac: mal: use devm for request_irq

Avoids manual frees. Also replaced irq_of_parse_and_map with
platform_get_irq since it's simpler and does the same thing.

Signed-off-by: Rosen Penev <rosenp@gmail.com>
Link: https://patch.msgid.link/20241030203727.6039-12-rosenp@gmail.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>