staging: unisys: virtpci: Add braces to if/else statements

Update if/else blocks with braces on both the if and the else blocks in virtpci.c.

Signed-off-by: Bryan Thompson <bryan.thompson@unisys.com>
Signed-off-by: Benjamin Romer <benjamin.romer@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>