arm64: dts: rockchip: Correct the model name for Radxa E25

Radxa E25 is a Carrier board, so update the model name for Radxa E25
as suggested by the Radxa website.

Fixes: 2bf2f4d9 ("arm64: dts: rockchip: Add Radxa CM3I E25")
Cc: Chukun Pan <amadeus@jmu.edu.cn>
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
Link: https://lore.kernel.org/r/20230123071654.73139-4-jagan@amarulasolutions.com


Signed-off-by: Heiko Stuebner <heiko@sntech.de>