arm64: errata: dissociate errata 1009 and 1286807

Dissociate QCOM_FALKOR_ERRATUM_1009 and ARM64_ERRATUM_1286807,
which enables the same workaround. This enables separate
disablement.

Change-Id: I7eed515467c687798c6585c50a171752ed23d1ab
Signed-off-by: Vinayak Menon <vinmenon@codeaurora.org>