spelling fixes: arch/x86_64/

Spelling fixes in arch/x86_64/.

Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Adrian Bunk <bunk@kernel.org>
diff --git a/arch/x86/kernel/smpboot_64.c b/arch/x86/kernel/smpboot_64.c
index e351ac4..d4c33ab 100644
--- a/arch/x86/kernel/smpboot_64.c
+++ b/arch/x86/kernel/smpboot_64.c
@@ -350,7 +350,7 @@
 	/*
 	 * We need to hold call_lock, so there is no inconsistency
 	 * between the time smp_call_function() determines number of
-	 * IPI receipients, and the time when the determination is made
+	 * IPI recipients, and the time when the determination is made
 	 * for which cpus receive the IPI in genapic_flat.c. Holding this
 	 * lock helps us to not include this cpu in a currently in progress
 	 * smp_call_function().