Revert "tuna: Enable Cortex A9 optimizations"

This reverts commit af060f2195ff48120bf6c20e88cc687ef2ccc1ab.
Revert "Enable SCU Speculative linefills"

This reverts commit e926dfe281138565e0d9e500de04741d3ba5718f.
Revert "Tuna: set PL310 cache controller prefetch offset to 3"

This reverts commit be01d9f581a11d27063556b7f06fd6e930d325e9.
Revert "Enable PL310 double linefill for Tuna board"

This reverts commit b39760180222461bd6317ff6a857c8efdb760104.
Revert "OMAP4: do not force workarounds for errata fixed in 4460"

This reverts commit de021d9bbea2a9baa883454b16436ed137f1b7b8.