spelling: s/retreive/retrieve/

Signed-off-by: Adrian Bunk <bunk@stusta.de>
diff --git a/arch/powerpc/platforms/powermac/cpufreq_64.c b/arch/powerpc/platforms/powermac/cpufreq_64.c
index a4b50c4..a415e8d 100644
--- a/arch/powerpc/platforms/powermac/cpufreq_64.c
+++ b/arch/powerpc/platforms/powermac/cpufreq_64.c
@@ -80,7 +80,7 @@
 };
 
 /* Power mode data is an array of the 32 bits PCR values to use for
- * the various frequencies, retreived from the device-tree
+ * the various frequencies, retrieved from the device-tree
  */
 static u32 *g5_pmode_data;
 static int g5_pmode_max;