The new folder structure now looks like this:
device/qcom/sepolicy_vndr
├─ legacy-um (meant for sdm845 until sm8350)
├─ sm8450
└─ sm8550
SEPolicy.mk placed in the root automatically redirects devices to the
proper subfolder.
Change-Id: I4ed1a06af779909d64172da294c4a99a3ae9ba0d