ARM: dts: atlas6: add resets property for VPP nodes

this patch adds missed resets property for CSR SiRFatlasVI Video Post
Processor(VPP) node.
Signed-off-by: Renwei Wu <renwei.wu@csr.com>
Signed-off-by: Barry Song <Baohua.Song@csr.com>

arch/arm/boot/dts/atlas6.dtsi

@@ -131,6 +131,7 @@ vpp@90020000 {
 				reg = <0x90020000 0x10000>;
 				interrupts = <31>;
 				clocks = <&clks 35>;
+				resets = <&rstc 6>;
 			};
 		};