mtd: nand: Clarify Kconfig entry for software Hamming ECC entries

The software Hamming ECC correction implementation is referred as
MTD_NAND_ECC which is too generic. Rename it
MTD_NAND_ECC_SW_HAMMING. Also rename MTD_NAND_ECC_SMC which is an
SMC quirk in the Hamming implementation as
MTD_NAND_ECC_SW_HAMMING_SMC.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>

drivers/mtd/nand/raw/Kconfig

@@ -1,20 +1,19 @@
-config MTD_NAND_ECC
+config MTD_NAND_ECC_SW_HAMMING
 	tristate
 
-config MTD_NAND_ECC_SMC
+config MTD_NAND_ECC_SW_HAMMING_SMC
 	bool "NAND ECC Smart Media byte order"
-	depends on MTD_NAND_ECC
+	depends on MTD_NAND_ECC_SW_HAMMING
 	default n
 	help
 	  Software ECC according to the Smart Media Specification.
 	  The original Linux implementation had byte 0 and 1 swapped.
 
-
 menuconfig MTD_NAND
 	tristate "Raw/Parallel NAND Device Support"
 	depends on MTD
-	select MTD_NAND_ECC
 	select MTD_NAND_CORE
+	select MTD_NAND_ECC_SW_HAMMING
 	help
 	  This enables support for accessing all type of raw/parallel
 	  NAND flash devices. For further information see
@@ -132,7 +131,7 @@ config MTD_NAND_S3C2410_DEBUG
 config MTD_NAND_NDFC
 	tristate "NDFC NanD Flash Controller"
 	depends on 4xx
-	select MTD_NAND_ECC_SMC
+	select MTD_NAND_ECC_SW_HAMMING_SMC
 	help
 	  NDFC Nand Flash Controllers are integrated in IBM/AMCC's 4xx SoCs
 

drivers/mtd/nand/raw/Makefile

@@ -1,7 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0
 
 obj-$(CONFIG_MTD_NAND)			+= nand.o
-obj-$(CONFIG_MTD_NAND_ECC)		+= nand_ecc.o
+obj-$(CONFIG_MTD_NAND_ECC_SW_HAMMING)	+= nand_ecc.o
 obj-$(CONFIG_MTD_NAND_ECC_SW_BCH)	+= nand_bch.o
 obj-$(CONFIG_MTD_SM_COMMON) 		+= sm_common.o
 

drivers/mtd/nand/raw/nand_base.c

@@ -5081,7 +5081,7 @@ static int nand_set_ecc_soft_ops(struct nand_chip *chip)
 		ecc->bytes = 3;
 		ecc->strength = 1;
 
-		if (IS_ENABLED(CONFIG_MTD_NAND_ECC_SMC))
+		if (IS_ENABLED(CONFIG_MTD_NAND_ECC_SW_HAMMING_SMC))
 			ecc->options |= NAND_ECC_SOFT_HAMMING_SM_ORDER;
 
 		return 0;