rockchip: rk3328: Add support for Orange Pi R1 Plus LTS

The OrangePi R1 Plus LTS is a minor variant of OrangePi R1 Plus with
the on-board NIC chip changed from rtl8211e to yt8531c, and RAM type
changed from DDR4 to LPDDR3.

The device tree is taken from kernel v6.4-rc1.

Signed-off-by: Tianling Shen <cnsztl@gmail.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
diff --git a/board/rockchip/evb_rk3328/MAINTAINERS b/board/rockchip/evb_rk3328/MAINTAINERS
index 91dc6b5..8a19eb3 100644
--- a/board/rockchip/evb_rk3328/MAINTAINERS
+++ b/board/rockchip/evb_rk3328/MAINTAINERS
@@ -24,6 +24,12 @@
 F:      configs/orangepi-r1-plus-rk3328_defconfig
 F:      arch/arm/dts/rk3328-orangepi-r1-plus-u-boot.dtsi
 
+ORANGEPI-R1-PLUS-LTS-RK3328
+M:      Tianling Shen <cnsztl@gmail.com>
+S:      Maintained
+F:      configs/orangepi-r1-plus-lts-rk3328_defconfig
+F:      arch/arm/dts/rk3328-orangepi-r1-plus-lts-u-boot.dtsi
+
 ROC-RK3328-CC
 M:      Loic Devulder <ldevulder@suse.com>
 M:      Chen-Yu Tsai <wens@csie.org>