of: fix a few typos in the binding documentation

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
[rob herring: drop conflicting atmel-nand.txt changes]
Signed-off-by: Rob Herring <rob.herring@calxeda.com>

Documentation/devicetree/bindings/mtd/partition.txt

@@ -35,4 +35,4 @@ flash@0 {
 	uimage@100000 {
 		reg = <0x0100000 0x200000>;
 	};
-];
+};