x86: fix exec mappings comments

- noexec32 is on by default for years already
- add noexec32 to kernel-parameters and fix noexec typo in there

Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/arch/x86/kernel/setup64.c b/arch/x86/kernel/setup64.c
index 9042fb0..aee0e82 100644
--- a/arch/x86/kernel/setup64.c
+++ b/arch/x86/kernel/setup64.c
@@ -74,8 +74,8 @@
 Control non executable heap for 32bit processes.
 To control the stack too use noexec=off
 
-on	PROT_READ does not imply PROT_EXEC for 32bit processes
-off	PROT_READ implies PROT_EXEC (default)
+on	PROT_READ does not imply PROT_EXEC for 32bit processes (default)
+off	PROT_READ implies PROT_EXEC
 */
 static int __init nonx32_setup(char *str)
 {