yocto: update master

Summary:
Update master at 15ee6f982
update-submodule: yocto/lf-master

Test Plan: CIT build passes.

Reviewed By: williamspatrick

Differential Revision: D63934596

fbshipit-source-id: 80385986d3a2877b62be91e3018549873f754c8b

yocto_repos.sh

@@ -12,7 +12,7 @@ rocko_repos=(
 )
 rocko_poky_patch="0001-rocko-backport-support-for-override.patch 0002-Remove-checks-on-python.patch 0003-Add-support-to-build-on-centOS9.patch"
 lf_master_repos=(
-    lf-openbmc:b0587b300
+    lf-openbmc:15ee6f982
 )
 lf_dunfell_repos=(
     lf-openbmc:c2858f16b