s3fb: fix up DDC build with MTRR disabled.

drivers/video/s3fb.c: In function 's3_pci_remove':
drivers/video/s3fb.c:1388: error: 'par' undeclared (first use in this function)

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>