mmc: fsl_esdhc: add compatible for fsl, imx53-esdhc

Add compatible "fsl,imx53-esdhc" to keep mmc working on i.MX53 platforms
with CONFIG_DM_MMC=y

Signed-off-by: Patrick Bruenn <p.bruenn@beckhoff.com>
diff --git a/drivers/mmc/fsl_esdhc.c b/drivers/mmc/fsl_esdhc.c
index 8463731..2fa61c4 100644
--- a/drivers/mmc/fsl_esdhc.c
+++ b/drivers/mmc/fsl_esdhc.c
@@ -1584,6 +1584,7 @@
 };
 
 static const struct udevice_id fsl_esdhc_ids[] = {
+	{ .compatible = "fsl,imx53-esdhc", },
 	{ .compatible = "fsl,imx6ul-usdhc", },
 	{ .compatible = "fsl,imx6sx-usdhc", },
 	{ .compatible = "fsl,imx6sl-usdhc", },