You may need to add a FLASH ID in file drivers/mtd/jedec_flash.c, take the SST39VF1601 as exaple, add a line for your SST39VF3201, probably should be:
#define SST39VF3201 0x235b
You may need to add a FLASH ID in file drivers/mtd/jedec_flash.c, take the SST39VF1601 as exaple, add a line for your SST39VF3201, probably should be:
#define SST39VF3201 0x235b