arm64: dts: rockchip: Fix indentation on rk3399 haikou demo dtso

The regulator-cam-dovdd-1v8 uses spaces for indentation, where it should
use tabs. Fix this.

Fixes: 066a69db ("arm64: dts: rockchip: add overlay for RK3399 Puma Haikou Video Demo adapter")
Signed-off-by: Heiko Stuebner <heiko.stuebner@cherry.de>
Reviewed-by: Quentin Schulz <quentin.schulz@cherry.de>
Link: https://patch.msgid.link/20251020091139.3652738-1-heiko@sntech.de


Signed-off-by: Heiko Stuebner <heiko@sntech.de>