Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
diff --git a/arch/cris/kernel/traps.c b/arch/cris/kernel/traps.c
index 541efbf0..8da53f3 100644
--- a/arch/cris/kernel/traps.c
+++ b/arch/cris/kernel/traps.c
@@ -183,7 +183,7 @@
 
 /*
  * This gets called from entry.S when the watchdog has bitten. Show something
- * similiar to an Oops dump, and if the kernel is configured to be a nice
+ * similar to an Oops dump, and if the kernel is configured to be a nice
  * doggy, then halt instead of reboot.
  */
 void