use just one handler for irq
This is in response to the suggestion in [PATCH v12 5/7] media: chips-media: wave5: Add the v4l2 layer
From: Ivan Bornyakov brnkv.i1@gmail.com
I believe, instead of wave5_vpu_irq() + wave5_vpu_get_interrupt_for_inst() + wave5_vpu_irq_thread() you can reduce interrupt handling to only threaded part with something like this:
Thanks to @bbeckett for helping me rearrange this until it worked