staging: unisys: visorhba: Correct a typo in comment

Correct a typo in comment.
Misspelling found using checkpatch.pl.

Signed-off-by: R Veera Kumar <vkor@vkten.in>
Link: https://lore.kernel.org/r/20200405175722.8188-1-vkor@vkten.in


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>