MIPS: csrc-r4k: Fix spelling mistake.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/kernel/csrc-r4k.c b/arch/mips/kernel/csrc-r4k.c
index 86e026f..74fb745 100644
--- a/arch/mips/kernel/csrc-r4k.c
+++ b/arch/mips/kernel/csrc-r4k.c
@@ -27,7 +27,7 @@
 	if (!cpu_has_counter || !mips_hpt_frequency)
 		return -ENXIO;
 
-	/* Calclate a somewhat reasonable rating value */
+	/* Calculate a somewhat reasonable rating value */
 	clocksource_mips.rating = 200 + mips_hpt_frequency / 10000000;
 
 	clocksource_set_clock(&clocksource_mips, mips_hpt_frequency);