libpciaccess: close mtrr fd on pci_cleanup

Since the fd is not closed, calling pci_system_init and
pci_system_cleanup more than 1024 times results in "too many files open"
error.

Signed-off-by: Nithin Nayak Sujir <nsujir@broadcom.com>
Reviewed-by: Jeremy Huddleston <jeremyhu@apple.com>
1 file changed