x86 boot code comments typos

Fix comments typos in new x86 boot code.

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
diff --git a/arch/i386/boot/header.S b/arch/i386/boot/header.S
index 6b9923fb..32ce54a 100644
--- a/arch/i386/boot/header.S
+++ b/arch/i386/boot/header.S
@@ -225,7 +225,7 @@
 	int	$0x13
 #endif
 
-# We will have entired with %cs = %ds+0x20, normalize %cs so
+# We will have entered with %cs = %ds+0x20, normalize %cs so
 # it is on par with the other segments.
 	pushw	%ds
 	pushw	$setup2