can: c_can: Simplify handling syscon error path

Use error handling block instead of open-coding it in one of probe
failure cases.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
Link: https://patch.msgid.link/20250212-syscon-phandle-args-can-v2-2-ac9a1253396b@linaro.org


Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>