pkg/firmware: Update the kernel package to a newer version.
# Make modules from a recentish kernel available
-FROM linuxkit/kernel:4.14.28 AS kernel
+FROM linuxkit/kernel:4.14.126 AS kernel
FROM linuxkit/alpine:86cd4f51b49fb9a078b50201d892a3c7973d48ec AS build
RUN apk add --no-cache git kmod
