ARM: dts: imx7d: Specify viewport count for PCIE block

i.MX7D comes with 4 viewports, so configure PCIE node accordingly so
that the driver won't assume we only have 2.
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Cc: Richard Zhu <hongxing.zhu@nxp.com>
Cc: Chris Healy <cphealy@gmail.com>
Cc: Lucas Stach <l.stach@pengutronix.de>
Cc: Fabio Estevam <fabio.estevam@nxp.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Reviewed-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx7d.dtsi

@@ -154,6 +154,7 @@ pcie: pcie@33800000 {
 		ranges = <0x81000000 0 0          0x4ff80000 0 0x00010000   /* downstream I/O */
 			  0x82000000 0 0x40000000 0x40000000 0 0x0ff00000>; /* non-prefetchable memory */
 		num-lanes = <1>;
+		num-viewport = <4>;
 		interrupts = <GIC_SPI 122 IRQ_TYPE_LEVEL_HIGH>;
 		interrupt-names = "msi";
 		#interrupt-cells = <1>;