mtd: atmel_nand: Simplify error messages

The error messages when the ECC controller is misconfigured through the
device tree are very precise. As a result they can (and will) get
obsolete when new revisions of the controller appear.

Simplify them before adding the support for the new revision.
Signed-off-by: Romain Izard <romain.izard.pro@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>

drivers/mtd/nand/atmel_nand.c

@@ -1550,7 +1550,7 @@ static int atmel_of_init_port(struct atmel_nand_host *host,
 		if ((val != 2) && (val != 4) && (val != 8) && (val != 12) &&
 				(val != 24)) {
 			dev_err(host->dev,
-				"Unsupported PMECC correction capability: %d; should be 2, 4, 8, 12 or 24\n",
+				"Required ECC strength not supported: %u\n",
 				val);
 			return -EINVAL;
 		}
@@ -1560,7 +1560,7 @@ static int atmel_of_init_port(struct atmel_nand_host *host,
 	if (of_property_read_u32(np, "atmel,pmecc-sector-size", &val) == 0) {
 		if ((val != 512) && (val != 1024)) {
 			dev_err(host->dev,
-				"Unsupported PMECC sector size: %d; should be 512 or 1024 bytes\n",
+				"Required ECC sector size not supported: %u\n",
 				val);
 			return -EINVAL;
 		}