mmc: fsl_esdhc: Convert to use livetree API for fdt access

Convert to using livetree API functions.

Without this if livetree is enabled (OF_LIVE) the fsl_esdhc_imx
driver will fail to read vendor-specific properties from the dt.

Signed-off-by: Tim Harvey <tharvey@gateworks.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
diff --git a/drivers/mmc/fsl_esdhc_imx.c b/drivers/mmc/fsl_esdhc_imx.c
index fb410104..d7a45ef0 100644
--- a/drivers/mmc/fsl_esdhc_imx.c
+++ b/drivers/mmc/fsl_esdhc_imx.c
@@ -1398,8 +1398,7 @@
 	struct udevice *vqmmc_dev;
 	int ret;
 
-	const void *fdt = gd->fdt_blob;
-	int node = dev_of_offset(dev);
+	ofnode node = dev_ofnode(dev);
 	fdt_addr_t addr;
 	unsigned int val;
 
@@ -1413,15 +1412,15 @@
 	priv->dev = dev;
 	priv->mode = -1;
 
-	val = fdtdec_get_int(fdt, node, "fsl,tuning-step", 1);
+	val = ofnode_read_u32_default(node, "fsl,tuning-step", 1);
 	priv->tuning_step = val;
-	val = fdtdec_get_int(fdt, node, "fsl,tuning-start-tap",
-			     ESDHC_TUNING_START_TAP_DEFAULT);
+	val = ofnode_read_u32_default(node, "fsl,tuning-start-tap",
+				      ESDHC_TUNING_START_TAP_DEFAULT);
 	priv->tuning_start_tap = val;
-	val = fdtdec_get_int(fdt, node, "fsl,strobe-dll-delay-target",
-			     ESDHC_STROBE_DLL_CTRL_SLV_DLY_TARGET_DEFAULT);
+	val = ofnode_read_u32_default(node, "fsl,strobe-dll-delay-target",
+				      ESDHC_STROBE_DLL_CTRL_SLV_DLY_TARGET_DEFAULT);
 	priv->strobe_dll_delay_target = val;
-	val = fdtdec_get_int(fdt, node, "fsl,signal-voltage-switch-extra-delay-ms", 0);
+	val = ofnode_read_u32_default(node, "fsl,signal-voltage-switch-extra-delay-ms", 0);
 	priv->signal_voltage_switch_extra_delay_ms = val;
 
 	if (dev_read_bool(dev, "broken-cd"))