[MTD] OneNAND: return ecc error code only when 2-bit ecc occurs

we don't need to return ecc error when 1-bit ecc.
We only return error code when 2-bit ecc error

Signed-off-by: Kyungmin Park <[e-mail]>

drivers/mtd/onenand/onenand_base.c

···
 		int ecc = this->read_word(this->base + ONENAND_REG_ECC_STATUS);
 		if (ecc) {
 			DEBUG(MTD_DEBUG_LEVEL0, "onenand_wait: ECC error = 0x%04x\n", ecc);
-			if (ecc & ONENAND_ECC_2BIT_ALL)
+			if (ecc & ONENAND_ECC_2BIT_ALL) {
 				mtd->ecc_stats.failed++;
-			else if (ecc & ONENAND_ECC_1BIT_ALL)
+				return ecc;
+			} else if (ecc & ONENAND_ECC_1BIT_ALL)
 				mtd->ecc_stats.corrected++;
 		}
-		return ecc;
 	}
 
 	return 0;