ARM: tegra: Fix Beaver's PCIe lane configuration

Beaver's PCIe lane configuration most closely matches x2 x2 x2 rather
than x4 x1 x1, since clocks 0 and 2 are used, and lanes 0 and 5 are used,
and the only way those align is with a x2 x2 x2 configuration.

Also, disable root port 1; there's nothing connected to it. Root port 0
is the on-board PCIe Ethernet, and port 2 is the mini-PCIe slot.
Signed-off-by: NStephen Warren <swarren@nvidia.com>
Signed-off-by: NThierry Reding <treding@nvidia.com>
Signed-off-by: NStephen Warren <swarren@nvidia.com>

arch/arm/boot/dts/tegra30-beaver.dts

@@ -18,16 +18,16 @@
 
 		pci@1,0 {
 			status = "okay";
-			nvidia,num-lanes = <4>;
+			nvidia,num-lanes = <2>;
 		};
 
 		pci@2,0 {
-			status = "okay";
-			nvidia,num-lanes = <1>;
+			nvidia,num-lanes = <2>;
 		};
 
 		pci@3,0 {
-			nvidia,num-lanes = <1>;
+			status = "okay";
+			nvidia,num-lanes = <2>;
 		};
 	};