mtd: hyperbus: Add proper error message for missing compatible

In case the compatible "cypress,hyperflash" is not given
output a proper error message.

Signed-off-by: Dirk Behme <[email protected]>
Signed-off-by: Vignesh Raghavendra <[email protected]>

Author: dirkbehme

drivers/mtd/hyperbus/hyperbus-core.c

@@ -73,8 +73,10 @@ int hyperbus_register_device(struct hyperbus_device *hbdev)
 
 	np = hbdev->np;
 	ctlr = hbdev->ctlr;
-	if (!of_device_is_compatible(np, "cypress,hyperflash"))
+	if (!of_device_is_compatible(np, "cypress,hyperflash")) {
+		dev_err(ctlr->dev, "\"cypress,hyperflash\" compatible missing\n");
 		return -ENODEV;
+	}
 
 	hbdev->memtype = HYPERFLASH;