clocksource: mips-gic: Move gic_frequency to clocksource driver

There's no reason for gic_frequency to be global any more and it
certainly doesn't belong in the GIC irqchip driver, so move it to
the GIC clocksource driver.

Signed-off-by: Andrew Bresticker <abrestic@chromium.org>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: Qais Yousef <qais.yousef@imgtec.com>
Cc: John Crispin <blogic@openwrt.org>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/8137/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

drivers/clocksource/mips-gic-timer.c

@@ -17,6 +17,7 @@
 
 static DEFINE_PER_CPU(struct clock_event_device, gic_clockevent_device);
 static int gic_timer_irq_installed;
+static unsigned int gic_frequency;
 
 static int gic_next_event(unsigned long delta, struct clock_event_device *evt)
 {
@@ -112,6 +113,8 @@ static struct clocksource gic_clocksource = {
 
 void __init gic_clocksource_init(unsigned int frequency)
 {
+	gic_frequency = frequency;
+
 	/* Set clocksource mask. */
 	gic_clocksource.mask = CLOCKSOURCE_MASK(gic_get_count_width());