meta-agl-bsp: fix a couple of override syntax misconversions

meta-agl-bsp: fix a couple of override syntax misconversions

There were a couple of misconversions from the override syntax
conversion script still lurking in the i.MX8MQ EVK machine include
files, fix them.

Bug-AGL: SPEC-4052

Signed-off-by: Scott Murray <scott.murray@konsulko.com>
Change-Id: Ia441bb46cc29530d3909faf7385adca633fc3db2
Reviewed-on: https://gerrit.automotivelinux.org/gerrit/c/AGL/meta-agl/+/26658
Tested-by: Jenkins Job builder account
ci-image-build: Jenkins Job builder account
ci-image-boot-test: Jenkins Job builder account
Reviewed-by: Jan-Simon Moeller <jsmoeller@linuxfoundation.org>