ARM: bcm2835: fix typos in DT binding documentation

The compatible value shouldn't include ".txt", which was probably cut
and paste from the filename.
Reported-by: Domenico Andreoli <cavokz@gmail.com>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Olof Johansson <olof@lixom.net>

Documentation/devicetree/bindings/interrupt-controller/brcm,bcm2835-armctrl-ic.txt

@@ -7,7 +7,7 @@ as "armctrl" in the SoC documentation, hence naming of this binding.
 
 Required properties:
 
-- compatible : should be "brcm,bcm2835-armctrl-ic.txt"
+- compatible : should be "brcm,bcm2835-armctrl-ic"
 - reg : Specifies base physical address and size of the registers.
 - interrupt-controller : Identifies the node as an interrupt controller
 - #interrupt-cells : Specifies the number of cells needed to encode an

Documentation/devicetree/bindings/timer/brcm,bcm2835-system-timer.txt

@@ -7,7 +7,7 @@ free running counter values, and generates an interrupt.
 
 Required properties:
 
-- compatible : should be "brcm,bcm2835-system-timer.txt"
+- compatible : should be "brcm,bcm2835-system-timer"
 - reg : Specifies base physical address and size of the registers.
 - interrupts : A list of 4 interrupt sinks; one per timer channel.
 - clock-frequency : The frequency of the clock that drives the counter, in Hz.