staging: mt7621-dts: add sysctl registers base address to pcie

Add missing system control registers address in pcie node of
the device tree.
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/mt7621-dts/mt7621.dtsi

@@ -397,8 +397,8 @@ pcie: pcie@1e140000 {
 		reg = <0x1e140000 0x100     /* host-pci bridge registers */
 			0x1e142000 0x100    /* pcie port 0 RC control registers */
 			0x1e143000 0x100    /* pcie port 1 RC control registers */
-			0x1e144000 0x100>;  /* pcie port 2 RC control registers */
-
+			0x1e144000 0x100    /* pcie port 2 RC control registers */
+			0x1e000000 0x100>;  /* sysctl */
 		#address-cells = <3>;
 		#size-cells = <2>;