mtd: cfi_cmdset_0002: add CFI detection for SST 38VF640x chips
mtd: cfi_cmdset_0002: add CFI detection for SST 38VF640x chips

Add support for SST38VF640x chips in CFI mode.

Signed-off-by: Guillaume LECERF <52a6d65542b6cc074ecaa7849f64873c4c101661@gmail.com>
Signed-off-by: yidong zhang <c99ff4c8618b4b04b8287b9e100881c76f528dd3@gmail.com>
Signed-off-by: David Woodhouse <b460d66aaf00c296a3db1c1d9eeafc081d5f7d70@intel.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas