x86/kaslr: Fix typo in the KASLR_FLAG documentation

Documentation/x86/boot.txt labels the bit in
boot_params.hdr.loadflags as ALSR_FLAG while it should be
KASLR_FLAG.

Signed-off-by: Miroslav Benes <mbenes@suse.cz>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1429011324-7170-1-git-send-email-mbenes@suse.cz
Link: http://lkml.kernel.org/r/1431332153-18566-4-git-send-email-bp@alien8.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>

Documentation/x86/boot.txt

@@ -406,7 +406,7 @@ Protocol:	2.00+
 	- If 0, the protected-mode code is loaded at 0x10000.
 	- If 1, the protected-mode code is loaded at 0x100000.
 
-  Bit 1 (kernel internal): ALSR_FLAG
+  Bit 1 (kernel internal): KASLR_FLAG
 	- Used internally by the compressed kernel to communicate
 	  KASLR status to kernel proper.
 	  If 1, KASLR enabled.