For non A/B, system mount would happen through
early mount DT node in kernel, remove it from fstab.
Change-Id: Id9bc04f2a059af0a9fa4242b3c7540463528196e
This change introduces compile time flags based on
which we can build combinations of A/B and split features.
Based on the flags, appropriate settings are done in mk files,
and appropriate fstab.qcom/recovery.fstab are picked.
Change-Id: I55cbec9c280f95b043f31b833aef11c2cbe4ab00