serial: sc16is7xx: use device_property APIs when configuring irda mode

[ Upstream commit 1a0a2a1e ]

Convert driver to be property provider agnostic and allow it to be
used on non-OF platforms.

Signed-off-by: Hugo Villeneuve <hvilleneuve@dimonoff.com>
Link: https://lore.kernel.org/r/20230927160153.2717788-2-hugo@hugovil.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Stable-dep-of: 28fa3291 ("clk: fix an OF node reference leak in of_clk_get_parent_name()")
Signed-off-by: Sasha Levin <sashal@kernel.org>