Now that the users of gic_arch_extn have been fixed, drop the
"feature" for good. This leads to the removal of some now useless
locking.
Signed-off-by: NMarc Zyngier <marc.zyngier@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: Jason Cooper <jason@lakedaemon.net>
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>