kernel: bump 4.19 to 4.19.16

Refresh patches.
Remove upstreamed patches:
- backport/096-mips-math-emu-Write-protect-delay-slot-emulation-pages.patch
- backport/096-v4.20-netfilter-ipv6-Preserve-link-scope-traffic-original-.patch
- backport/424-v4.20-net-dsa-fix-88e6060-roaming.patch
- hack/100-mtd-rawnand-qcom-fix-memory-corruption-that-causes-p.patch
- pending/510-f2fs-fix-sanity_check_raw_super-on-big-endian-machines.patch
Update patch that no longer applies:
- backport/343-netfilter-nft_flow_offload-handle-netdevice-events-f.patch

Compile-tested: mesongx
Runtime-tested: mesongx

Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>

target/linux/generic/hack-4.19/902-debloat_proc.patch

@@ -327,7 +327,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
  
 --- a/net/core/sock.c
 +++ b/net/core/sock.c
-@@ -3477,6 +3477,8 @@ static __net_initdata struct pernet_oper
+@@ -3482,6 +3482,8 @@ static __net_initdata struct pernet_oper
  
  static int __init proto_init(void)
  {