drivers: hv: Fix whitespace errors

Fixed checkpatch warning and errors on hv driver.

Signed-off-by: Vasanth Mathivanan <vasanth3g@gmail.com>
Link: https://lore.kernel.org/r/20210219171311.421961-1-vasanth3g@gmail.com


Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Signed-off-by: Wei Liu <wei.liu@kernel.org>