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/kernel/vtime.c b/arch/s390/kernel/vtime.c
index 1ccdf4d..5e8ead4 100644
--- a/arch/s390/kernel/vtime.c
+++ b/arch/s390/kernel/vtime.c
@@ -44,7 +44,7 @@
 	__u64 timer;
 
 	asm volatile ("  STPT %0\n"  /* Store current cpu timer value */
-		      "  SPT %1"     /* Set new value immediatly afterwards */
+		      "  SPT %1"     /* Set new value immediately afterwards */
 		      : "=m" (timer) : "m" (expires) );
 	S390_lowcore.system_timer += S390_lowcore.last_update_timer - timer;
 	S390_lowcore.last_update_timer = expires;