We have linux-postmarketos-qcom and linux-postmarketos-qcom-msm8916 now,
which is quite confusing. linux-postmarketos-qcom was originally added
for MSM8974 devices (e.g. Nexus 5) and its patches on top of mainline
are therefore quite focused on MSM8974.
linux-postmarketos-qcom-msm8916 on the other hand, has patches specific
to MSM8916. The two packages do not have any patch in common, therefore
merging the two would only cause signficiant overhead to coordinate
testing for devices of the two SoCs.
Therefore, it is better to keep them separate.
To avoid confusion, rename linux-postmarketos-qcom to
linux-postmarketos-qcom-msm8974 to make it clear that it is really
a close-to-mainline kernel for MSM8974 devices.
[ci:skip-build]: already built successfully in CI
