[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/kernel/Makefile

diff --git a/arch/mips/kernel/Makefile b/arch/mips/kernel/Makefile
index 7851b4b..a2689f9 100644
--- a/arch/mips/kernel/Makefile
+++ b/arch/mips/kernel/Makefile
@@ -65,6 +65,7 @@
 
 obj-$(CONFIG_64BIT)		+= cpu-bugs64.o
 
+obj-$(CONFIG_I8253)		+= i8253.o
 obj-$(CONFIG_PCSPEAKER)		+= pcspeaker.o
 
 obj-$(CONFIG_KEXEC)		+= machine_kexec.o relocate_kernel.o