hikey960: Bump default kernel to 4.19

This moves the default HiKey960 kernel to 4.19.

This change should be applied after prebuilt a 4.19 kernel
is updated which has the performance hacks applied.

Change-Id: I035fe6c83f1bdfe7460a55177036b5060bcd13c1
Signed-off-by: John Stultz <john.stultz@linaro.org>
1 file changed