arm64: dts: rockchip: Enable pwm1 on rk3368-lion-haikou

arm64: dts: rockchip: Enable pwm1 on rk3368-lion-haikou

The pwm1 is exposed as BLT_CTRL signal on the MISC I/O pin header of the
haikou baseboard and the Qseven  standard specifies this signal is only
for PWM (either for a panel backlight or generic PWM).

So enable it in the Haikou baseboard for Lion.

Suggested-by: Quentin Schulz <quentin.schulz@cherry.de>
Signed-off-by: Heiko Stuebner <heiko.stuebner@cherry.de>
Reviewed-by: Quentin Schulz <quentin.schulz@cherry.de>
Link: https://patch.msgid.link/20260114230707.4175162-5-heiko@sntech.de
Signed-off-by: Heiko Stuebner <heiko@sntech.de>