rockchip: pwm: convert to use live dt

use live dt api to get base addr

Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
Acked-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
diff --git a/drivers/pwm/rk_pwm.c b/drivers/pwm/rk_pwm.c
index 2364c2d..7d3e11d 100644
--- a/drivers/pwm/rk_pwm.c
+++ b/drivers/pwm/rk_pwm.c
@@ -76,7 +76,7 @@
 {
 	struct rk_pwm_priv *priv = dev_get_priv(dev);
 
-	priv->regs = (struct rk3288_pwm *)devfdt_get_addr(dev);
+	priv->regs = (struct rk3288_pwm *)dev_read_addr(dev);
 
 	return 0;
 }