tools: PCI: Fix compiler warning in pcitest

Fix the following compiler warning in pcitest:

pcitest.c: In function main:
pcitest.c:214:4: warning: too many arguments for
format [-Wformat-extra-args]
    "usage: %s [options]\n"

Fixes: fbca0b284bd0 ("tools: PCI: Add 'h' in optstring of getopt()")
Signed-off-by: Alan Mikhak <[email protected]>
Signed-off-by: Lorenzo Pieralisi <[email protected]>
Reviewed-by: Paul Walmsley <[email protected]>
1 file changed