The cbr-reg DTS property uses a wrong name causing the RAC kernel
panic again on BCM6358 BCM6368 boards.
Use the correct cbr-reg name property.
Fixes: 7c9644a7b5 ("bmips: backport upstreamed RAC patches")
Signed-off-by: Daniel González Cabanelas <dgcbueu@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/16561
Signed-off-by: Robert Marko <robimarko@gmail.com>