rockchip: add support for Radxa ROCK Pi E v3.0

ROCK Pi E v3.0 uses DDR4 SDRAM instead of DDR3 SDRAM used in v1.2x.

prepare new rk3328-rock-pi-e-v3.dts in u-boot which just includes
upstream rk3328-rock-pi-e.dts.

defconfig still uses
 CONFIG_DEFAULT_FDT_FILE="rockchip/rk3328-rock-pi-e.dtb"

because v3.0 and prior are compatible.

Suggested-by: Jonas Karlman <jonas@kwiboo.se>
Signed-off-by: FUKAUMI Naoki <naoki@radxa.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 675b72d..8f619e5 100644
--- a/board/rockchip/evb_rk3328/MAINTAINERS
+++ b/board/rockchip/evb_rk3328/MAINTAINERS
@@ -64,5 +64,5 @@
 R:      Jonas Karlman <jonas@kwiboo.se>
 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
+F:      configs/rock-pi-e-v3-rk3328_defconfig
+F:      arch/arm/dts/rk3328-rock-pi-e*