lib/vsprintf: update documentation to cover all of %p[Mm][FR]

Acked-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/Documentation/printk-formats.txt b/Documentation/printk-formats.txt
index 7561d7e..8ffb274 100644
--- a/Documentation/printk-formats.txt
+++ b/Documentation/printk-formats.txt
@@ -69,6 +69,7 @@
 	%pMR	05:04:03:02:01:00
 	%pMF	00-01-02-03-04-05
 	%pm	000102030405
+	%pmR	050403020100
 
 	For printing 6-byte MAC/FDDI addresses in hex notation. The 'M' and 'm'
 	specifiers result in a printed address with ('M') or without ('m') byte