ath79: add support for linux 4.19

The following patches are dropped because they are merged upstream:
-0001-tty-serial-drop-QCA-pecific-SoC-symbols.patch
-0006-usb-drop-deprecated-symbols.patch
-0009-MIPS-ath79-add-lots-of-missing-registers.patch
-0010-MIPS-ath79-add-support-for-QCA953x-QCA956x-TP9343.patch
-0014-MIPS-ath79-finetune-cpu-overrides.patch
-0015-MIPS-ath79-enable-uart-during-early_prink.patch
-0016-MIPS-ath79-get-PCIe-controller-out-of-reset.patch

This patch is dropped due to the introduction of spi-mem framework:
-461-spi-ath79-add-fast-flash-read.patch

Thank to Michael Marley @mamarley for his work on this patch:
-910-unaligned_access_hacks.patch

Signed-off-by: Chuanhong Guo <gch981213@gmail.com>
[synchronized kernel config with make kernel_oldconfig]
Signed-off-by: Petr Štetiar <ynezz@true.cz>

target/linux/ath79/patches-4.19/405-mtd-tp-link-partition-parser.patch

@@ -0,0 +1,25 @@
+--- a/drivers/mtd/Kconfig
++++ b/drivers/mtd/Kconfig
+@@ -193,6 +193,12 @@ config MTD_MYLOADER_PARTS
+ 	  You will still need the parsing functions to be called by the driver
+ 	  for your particular device. It won't happen automatically.
+ 
++config MTD_TPLINK_PARTS
++	tristate "TP-Link AR7XXX/AR9XXX partitioning support"
++	depends on ATH79
++	---help---
++	  TBD.
++
+ comment "User Modules And Translation Layers"
+ 
+ #
+--- a/drivers/mtd/Makefile
++++ b/drivers/mtd/Makefile
+@@ -18,6 +18,7 @@ obj-$(CONFIG_MTD_BCM63XX_PARTS)	+= bcm63
+ obj-$(CONFIG_MTD_BCM47XX_PARTS)	+= bcm47xxpart.o
+ obj-$(CONFIG_MTD_MYLOADER_PARTS) += myloader.o
+ obj-y				+= parsers/
++obj-$(CONFIG_MTD_TPLINK_PARTS)	+= tplinkpart.o
+ 
+ # 'Users' - code which presents functionality to userspace.
+ obj-$(CONFIG_MTD_BLKDEVS)	+= mtd_blkdevs.o