[MIPS] i8253 PIT clocksource and clockevent drivers

Derived from the i386 variant with a few x86 complexities chopped off.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/cobalt/setup.c

@@ -15,6 +15,7 @@
 
 #include <asm/bootinfo.h>
 #include <asm/time.h>
+#include <asm/i8253.h>
 #include <asm/io.h>
 #include <asm/reboot.h>
 #include <asm/gt64120.h>
@@ -84,6 +85,11 @@ static struct resource cobalt_reserved_resources[] = {
 	},
 };
 
+void __init plat_time_init(void)
+{
+	setup_pit_timer();
+}
+
 void __init plat_mem_setup(void)
 {
 	int i;