lakitu_defconfig: Add ublk as a module BUG=b/494033246 TEST=presubmit, compile and load the module RELEASE_NOTE=Added support for loading the ublk kernel module. cos-patch: bug Change-Id: I9bf8f43726cd86a6620cfc7c91117cf24af90b74 Signed-off-by: Kevin Berry <kpberry@google.com> Reviewed-on: https://cos-review.googlesource.com/c/third_party/kernel/+/139394 Tested-by: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com> Reviewed-by: Miri Amarilio <mirilio@google.com> Main-Branch-Verified: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com> Reviewed-on: https://cos-review.googlesource.com/c/third_party/kernel/+/139682