OrangePi-RV2/R2V: fix copy/paste error in DT model string

Signed-off-by: Sven-Ola Tuecke <sven-ola@gmx.de>

Author: sven-ola

patch/u-boot/legacy/u-boot-spacemit-k1/007-orangepi-rv2-r2s-fit.patch

@@ -42,7 +42,7 @@ index 00000000000..e9202c5046a
 +#include "k1-x_spm8821.dtsi"
 +
 +/ {
-+	model = "ky x1 orangepi-rv2 board";
++	model = "ky x1 orangepi-r2s board";
 +
 +	aliases {
 +		efuse_power = &ldo_31;