staging: unisys: visorhba: "Prefer 'unsigned int'" checkpatch warnings

This patch fixes a few checkpatch warnings in visorhba:

    WARNING: Prefer 'unsigned int' to bare use of 'unsigned'

Signed-off-by: Tim Sell <Timothy.Sell@unisys.com>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>