Revert "video: tegra: use workqueues in syncpoint isr"

This reverts commit d375278ce113daa854bdba168d2fc4eeef9fab39.
Revert "video: tegra: fix empty name for undefined syncpts"

This reverts commit 2cac9a20afe503b08b7ff1746ee50effb5d91715.
Revert "video: tegra: change to rate requests per clock"

This reverts commit a6d2b422794774639c885650e6cf4aa5f827ebae.
#274

Signed-off-by: Xmister <xmisterhu@gmail.com>