configs: rockchip: rock-pi-4: use dtb for ROCK Pi 4A instead of 4B

rk3399-rock-pi-4a.dtb is enough for Radxa ROCK Pi 4A/B/A+/B+ and ROCK 4SE.

Signed-off-by: FUKAUMI Naoki <naoki@radxa.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
1 file changed