kernel: bump 4.19 to 4.19.115

Refreshed all patches.

Remove upstreamed:
- 600-ipv6-addrconf-call-ipv6_mc_up-for-non-Ethernet-inter.patch
- 184-USB-serial-option-add-Wistron-Neweb-D19Q1.patch

Fixes:
- CVE-2020-8647
- CVE-2020-8648 (potentially)
- CVE-2020-8649

Compile-tested on: cns3xxx
Runtime-tested on: cns3xxx

Signed-off-by: Koen Vandeputte <koen.vandeputte@ncentric.com>

target/linux/generic/hack-4.19/702-phy_add_aneg_done_function.patch

@@ -1,6 +1,6 @@
 --- a/include/linux/phy.h
 +++ b/include/linux/phy.h
-@@ -555,6 +555,12 @@ struct phy_driver {
+@@ -557,6 +557,12 @@ struct phy_driver {
  	/* Determines the negotiated speed and duplex */
  	int (*read_status)(struct phy_device *phydev);
  
@@ -15,7 +15,7 @@
  
 --- a/drivers/net/phy/phy_device.c
 +++ b/drivers/net/phy/phy_device.c
-@@ -1577,6 +1577,9 @@ int genphy_update_link(struct phy_device
+@@ -1581,6 +1581,9 @@ int genphy_update_link(struct phy_device
  {
  	int status;