mtd: nand: mxs_nand_spl: refactor mxs_flash_ident

The existing `mxs_flash_ident()` is limited to identify ONFi compliant
NAND chips only. In order to support non-ONFi NAND chips refactor the
function and rename it to `mxs_flash_onfi_ident()`.

A follow-up patch will add `mxs_flash_full_ident()` which allows to use
the chip ID list to lookup for supported NAND flashs.

Signed-off-by: Jörg Krause <joerg.krause@embedded.rocks>

drivers/mtd/nand/mxs_nand_spl.c

@@ -49,7 +49,7 @@ static void mxs_nand_command(struct mtd_info *mtd, unsigned int command,
 	}
 }
 
-static int mxs_flash_ident(struct mtd_info *mtd)
+static int mxs_flash_onfi_ident(struct mtd_info *mtd)
 {
 	register struct nand_chip *chip = mtd_to_nand(mtd);
 	int i;
@@ -109,6 +109,13 @@ static int mxs_flash_ident(struct mtd_info *mtd)
 	return 0;
 }
 
+static int mxs_flash_ident(struct mtd_info *mtd)
+{
+	int ret;
+	ret = mxs_flash_onfi_ident(mtd);
+	return ret;
+}
+
 static int mxs_read_page_ecc(struct mtd_info *mtd, void *buf, unsigned int page)
 {
 	register struct nand_chip *chip = mtd_to_nand(mtd);