kernel: copy kernel 4.19 code to 5.4

No changes were done to the patches while coping them. Currently they do
not apply on top of kernel 5.4.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

target/linux/generic/pending-5.4/465-m25p80-mx-disable-software-protection.patch

@@ -0,0 +1,18 @@
+From: Felix Fietkau <nbd@nbd.name>
+Subject: Disable software protection bits for Macronix flashes.
+
+Signed-off-by: Felix Fietkau <nbd@nbd.name>
+---
+ drivers/mtd/spi-nor/spi-nor.c | 1 +
+ 1 file changed, 1 insertion(+)
+
+--- a/drivers/mtd/spi-nor/spi-nor.c
++++ b/drivers/mtd/spi-nor/spi-nor.c
+@@ -2735,6 +2735,7 @@ static int spi_nor_init(struct spi_nor *
+ 	 */
+ 	if (JEDEC_MFR(nor->info) == SNOR_MFR_ATMEL ||
+ 	    JEDEC_MFR(nor->info) == SNOR_MFR_INTEL ||
++	    JEDEC_MFR(nor->info) == SNOR_MFR_MACRONIX ||
+ 	    JEDEC_MFR(nor->info) == SNOR_MFR_SST ||
+ 	    nor->info->flags & SPI_NOR_HAS_LOCK) {
+ 		write_enable(nor);