signal/x86: Remove pkey parameter from bad_area_nosemaphore

The function bad_area_nosemaphore always sets si_code to SEGV_MAPERR
and as such can never return a pkey parameter.  Therefore remove the
unusable pkey parameter from bad_area_nosemaphore.

Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>