ASoC: bcm: cygnus: use scoped child node loop

ASoC: bcm: cygnus: use scoped child node loop

cygnus_ssp_probe() manually puts the current child node before returning
from the child parsing loop on error.

Use for_each_available_child_of_node_scoped() so the current child node is
released automatically on early return and normal loop exit.

Signed-off-by: Cássio Gabriel <cassiogabrielcontato@gmail.com>
Link: https://patch.msgid.link/20260608-asoc-of-node-scoped-cleanup-v1-3-9e3ac518dc2e@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>