Disable software protection bits for Macronix flashes.

Signed-off-by: Felix Fietkau <nbd@nbd.name>

--- a/drivers/mtd/spi-nor/spi-nor.c
+++ b/drivers/mtd/spi-nor/spi-nor.c
@@ -1172,6 +1172,7 @@ int spi_nor_scan(struct spi_nor *nor, co
 
 	if (JEDEC_MFR(info) == SNOR_MFR_ATMEL ||
 	    JEDEC_MFR(info) == SNOR_MFR_INTEL ||
+	    JEDEC_MFR(info) == SNOR_MFR_MACRONIX ||
 	    JEDEC_MFR(info) == SNOR_MFR_SST ||
 	    info->flags & SPI_NOR_HAS_LOCK) {
 		write_enable(nor);