Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
diff --git a/arch/s390/mm/fault.c b/arch/s390/mm/fault.c
index 2c57806..9217e33 100644
--- a/arch/s390/mm/fault.c
+++ b/arch/s390/mm/fault.c
@@ -392,7 +392,7 @@
 {
 	int fault;
 
-	/* Protection exception is supressing, decrement psw address. */
+	/* Protection exception is suppressing, decrement psw address. */
 	regs->psw.addr -= (pgm_int_code >> 16);
 	/*
 	 * Check for low-address protection.  This needs to be treated