rockchip: rk3328: add rock-pi-e-rk3328_defconfig file

This commit add the default configuration file and relevant description
for rock-pi-e board

Signed-off-by: Banglang Huang <banglang.huang@foxmail.com>
diff --git a/board/rockchip/evb_rk3328/MAINTAINERS b/board/rockchip/evb_rk3328/MAINTAINERS
index 89becf4..e7dd59f 100644
--- a/board/rockchip/evb_rk3328/MAINTAINERS
+++ b/board/rockchip/evb_rk3328/MAINTAINERS
@@ -17,3 +17,10 @@
 S:      Maintained
 F:      configs/rock64-rk3328_defconfig
 F:      arch/arm/dts/rk3328-rock64-u-boot.dtsi
+
+ROCKPIE-RK3328
+M:      Banglang Huang <banglang.huang@foxmail.com>
+S:      Maintained
+F:      configs/rock-pi-e-rk3328_defconfig
+F:      arch/arm/dts/rk3328-rock-pi-e.dts
+F:      arch/arm/dts/rk3328-rock-pi-e-u-boot.dtsi