Revert "tuna: Enable Cortex A9 optimizations"

This reverts commit 90ba6f2a10caad8c833e803306116793ec609461.
Revert "Enable SCU Speculative linefills"

This reverts commit 53cb507ea0cd20ac6d3aacac20c1c93d467e5500.
Revert "Tuna: set PL310 cache controller prefetch offset to 3"

This reverts commit 09246c47b6b424ad517675639fa52cdb6fe3d49a.
Revert "Enable PL310 double linefill for Tuna board"

This reverts commit 1159616de50d40b9ff62fd7d42ea7fde5249f287.
Revert "OMAP4: do not force workarounds for errata fixed in 4460"

This reverts commit 4009cd010b1a1a24fb5f3b9f418a3ee5e67de877.