anv: fix error message

anv: fix error message

`strerror()` takes an `errno`, not the negative value returned by the
`ioctl()`.
Instead of fixing this as `"%s", strerror(errno)`, let's just use the
`"%m"` shortcut for it.

Fixes: 2b5f30b1d91b98ab27ba ("anv: implement VK_INTEL_performance_query")
Signed-off-by: Eric Engestrom <eric.engestrom@intel.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>