kernel: bump 4.9 to 4.9.219
Refreshed all patches.
Altered patches:
- 0026-NET-multi-phy-support.patch
Fixes:
- CVE-2020-8647
- CVE-2020-8648 (Potentially)
- CVE-2020-8649
Compile-tested on: ar71xx
Runtime-tested on: ar71xx
Signed-off-by:
Koen Vandeputte <koen.vandeputte@ncentric.com>