of: fix handling of '/' in options for of_find_node_by_path()

of: fix handling of '/' in options for of_find_node_by_path()

commit 106937e8ccdcf0f4b95fbf0fe9abd42766cade33 upstream.

Ensure proper handling of paths with appended options (after ':'),
where those options may contain a '/'.

Fixes: 7914a7c5651a ("of: support passing console options with stdout-path")
Reported-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Leif Lindholm <leif.lindholm@linaro.org>
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>