HID: Intel-thc-hid: Intel-quicki2c: Support writing output report format

HID: Intel-thc-hid: Intel-quicki2c: Support writing output report format

There are two output formats requested in the HID-over-I2C specification:
- Command format (set feature/set report): encoded command written to
  command register, followed by data written to data register
- Output report format: all data written directly to output register

Current quicki2c_init_write_buf() implementation only supports the
command format.

Extend quicki2c_init_write_buf() to automatically detect the output
format based on the presence of command parameters and prepare the
appropriate output buffer accordingly.

Tested-by: Rui Zhang <rui1.zhang@intel.com>
Signed-off-by: Even Xu <even.xu@intel.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Jiri Kosina <jkosina@suse.com>