soc: rockchip: grf: Add select correct PWM implementation on RK3368

Similar to the RK3288, the RK3368 has two different implementations of
the PWM block inside the SoC - the newer ones that we have a driver for
and that is used on every SoC and a previous variant that was likely
left as a fallback if the new one creates problems.

The devicetree is already set up for the new variant, so make sure
we actually use it - similar to the RK3288.

Signed-off-by: Heiko Stuebner <heiko.stuebner@cherry.de>
Link: https://patch.msgid.link/20251021074254.87065-4-heiko@sntech.de
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

Author: Heiko Stuebner

drivers/soc/rockchip/grf.c

@@ -91,6 +91,7 @@ static const struct rockchip_grf_info rk3328_grf __initconst = {
 
 static const struct rockchip_grf_value rk3368_defaults[] __initconst = {
 	{ "jtag switching", RK3368_GRF_SOC_CON15, FIELD_PREP_WM16_CONST(BIT(13), 0) },
+	{ "pwm select", RK3368_GRF_SOC_CON15, FIELD_PREP_WM16_CONST(BIT(12), 1) },
 };
 
 static const struct rockchip_grf_info rk3368_grf __initconst = {