hyper-v: Switch to use UUID types directly

uuid_le is an alias for guid_t and is going to be removed in the future.
Replace it with original type.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20200423134505.78221-4-andriy.shevchenko@linux.intel.com


Signed-off-by: Wei Liu <wei.liu@kernel.org>