cfi_flash: don't hide write/erase errors

Partially revert commit 0d01f66d23 (CFI: cfi_flash write fix for AMD
legacy).

flash_full_status_check() used to skip status register parsing when
flash_status_check() returns OK. This is wrong since flash_status_check()
must return OK for other status bits to be valid.

Cc: Ed Swarthout <Ed.Swarthout@freescale.com>
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Stefan Roese <sr@denx.de>

drivers/mtd/cfi_flash.c

@@ -593,7 +593,7 @@ static int flash_full_status_check (flash_info_t * info, flash_sect_t sector,
 	case CFI_CMDSET_INTEL_PROG_REGIONS:
 	case CFI_CMDSET_INTEL_EXTENDED:
 	case CFI_CMDSET_INTEL_STANDARD:
-		if ((retcode != ERR_OK)
+		if ((retcode == ERR_OK)
 		    && !flash_isequal (info, sector, 0, FLASH_STATUS_DONE)) {
 			retcode = ERR_INVAL;
 			printf ("Flash %s error at address %lx\n", prompt,