aports' community/crust package generates a crust-pinephone subpackage
that is equivalent to pmaports' current main/crust package, that is,
the crust-pinephone subpackage contains the SCP firmware binary needed for
the PinePhone. The aports crust package itself only contains a LICENSE file.
Furthermore, aports' package updated to v0.6 recently, so apk would pick it
over pmaports' v0.5 package, which would cause the build to fail because of
the missing SCP firmware binary.
This change fixes the build of u-boot-pinephone by switching the dependency to
the aports crust-pinephone package.
a12bbf1057