HWMC code cleanup

[xzhangxa]

• Remove some not needed HWMC controls, driver should just pass the cmd
  without knowing the logic, the logic should be handled in user space;
• Refactor HWMC and log control code.

This is split from the original ctrls fix #91 so it's based on that PR.

[dmipx]

I think it need to be rebased and these patch file names should be reenumerated

[xzhangxa]

I think it need to be rebased and these patch file names should be reenumerated

Rebased, using 0062 to avoid conflict again with the two new PRs of 0060.

[remibettan]

The aim of this change is to restore the hwm mechanism so that it would work with this driver, the same way as it works with USB driver.
The set_xu method used for hwm should get a buffer of 1024 bytes (now it needs 1028 bytes).
The get_xu method used for hwm should return a buffer that would start with the opcode, and then the answer buffer (without the input command buffer.