soc/intel/cmn/block/cnvi: Add missing parenthesis in ASL code

It was accidentally deleted in a recent commit, but missed in review
since it is in a comment and not the actual acpigen code.

Change-Id: I0d28c2a67579a135e9002eaab9450353e8eec2d5
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/86773
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nicholas Sudsgaard <devel+coreboot@nsudsgaard.com>

src/soc/intel/common/block/cnvi/cnvi.c

@@ -133,7 +133,7 @@ static void cnvw_fill_ssdt(const struct device *dev)
  *							If ((\_SB.PCI0.GBTR() == One))
  *							{
  *								\_SB.PCI0.BTRK (Zero)
- *								Sleep (160
+ *								Sleep (160)
  *								Local2 = One
  *							}
  *						}