cmd: nandbcb: Reconstruct the nandbcb tool for all platforms

The original nandbcb tool was designed for imx6 only, when trying to
leverage it to replace the kobs-ng tool, we found the design is not
friendly for supporting all platforms. To support all iMX6/7/8 platforms
and for easy further maintain, I reconstruct the structure of the tool.

The main changes including:

1. Use platform_data to determine the logic branches rather than simply
   use SOC name.
2. More data structures as parameter for functions.
3. Global variables to define the FCB/DBBT/FW locations.
4. Implement the kobs-ng default 4 FCB/4 DBBT/2 FW layout.
5. Support Hamming coding/ 40bit BCH/ 62bit BCH coding FCB.
6. Dump and compare all written FCB/DBBT to verify data integrity.

The tool has been verified on iMX6Q/DL, 6SX, 7D, 6ULL, iMX8QX, iMX8MM.

Signed-off-by: Han Xu <han.xu@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>

arch/arm/include/asm/mach-imx/imx-nandbcb.h

@@ -9,9 +9,11 @@
 
 #define FCB_FINGERPRINT		0x20424346      /* 'FCB' */
 #define FCB_VERSION_1		0x01000000
+#define FCB_FINGERPRINT_OFF	0x4		/* FCB fingerprint offset*/
 
-#define DBBT_FINGERPRINT2	0x54424244	/* 'DBBT' */
+#define DBBT_FINGERPRINT	0x54424244	/* 'DBBT' */
 #define DBBT_VERSION_1		0x01000000
+#define DBBT_FINGERPRINT_OFF	0x4		/* DBBT fingerprint offset*/
 
 struct dbbt_block {
 	u32 checksum;	/* reserved on i.MX6 */