ci: Add x86 5.4 kernel to CI

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
12 jobs for next in 26 minutes and 25 seconds (queued for 12 seconds)
Status Job ID Name Coverage
  Build
passed #169448
arm-4.14-release

00:23:19

passed #169447
arm-4.19-release

00:25:08

passed #169449
arm-4.4-cip-head

00:17:43

passed #169451
arm64-4.14-release

00:23:15

passed #169450
arm64-4.19-release

00:26:24

passed #169458
powerpc-4.19-release

00:11:25

passed #169455
x86-4.14-release

00:15:20

passed #169453
x86-4.19-cip-head

00:15:13

passed #169454
x86-4.19-cip-release

00:16:01

passed #169456
x86-4.4-cip-head

00:12:52

passed #169457
x86-4.4-cip-release

00:12:10

passed #169452
x86-5.4-head

00:17:36