LFU-753-3 video: imx93-parallel-disp-fmt: Fix uninitialized variable

The bus_format variable is not initialized, in case the fmt property
is not set, it will cause problem to following codes.
Fix coverity issue 37938122.

Signed-off-by: Ye Li <ye.li@nxp.com>
Reviewed-by: Peng Fan <peng.fan@nxp.com>

drivers/video/nxp/imx/imx93-parallel-disp-fmt.c

@@ -81,7 +81,7 @@ static int imx93_pdf_probe(struct udevice *dev)
 {
 	struct imx93_pdf_priv *priv = dev_get_priv(dev);
 	const char *fmt;
-	u32 bus_format;
+	u32 bus_format = 0;
 	int ret;
 
 	priv->addr = (void __iomem *)dev_read_addr(dev_get_parent(dev));