Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
diff --git a/arch/ia64/kernel/cyclone.c b/arch/ia64/kernel/cyclone.c
index d52f1f7..1b811c6 100644
--- a/arch/ia64/kernel/cyclone.c
+++ b/arch/ia64/kernel/cyclone.c
@@ -31,7 +31,7 @@
         .rating         = 300,
         .read           = read_cyclone,
         .mask           = (1LL << 40) - 1,
-        .mult           = 0, /*to be caluclated*/
+        .mult           = 0, /*to be calculated*/
         .shift          = 16,
         .flags          = CLOCK_SOURCE_IS_CONTINUOUS,
 };