ipq806x: switch to 4.19 kernel version
It has been used by several people for some time already and feedback
has been mostly positive.
Ref: https://github.com/openwrt/openwrt/pull/2472
Tested-by: Hannu Nyman <[email protected]> [ipq8065, R7800]
Tested-by: Stefan Lippers-Hollmann <[email protected]> [ipq8065, NBG6817]
Signed-off-by: Ansuel Smith <[email protected]>
[separate commit, commit subject and description facelift]
Signed-off-by: Petr Štetiar <[email protected]>