Revert "arm64: a37xx: dts: Add pin control nodes to DT"

The commit "arm64: mvebu: Add pinctrl nodes for Armada 3700" has
added new pinctrl nodes.
This reverts commit f7cab0f9.

Cc: Simon Glass <sjg@chromium.org>
Cc: Stefan Roese <sr@denx.de>
Signed-off-by: Ken Ma <make@marvell.com>
Signed-off-by: Stefan Roese <sr@denx.de>

arch/arm/dts/armada-37xx.dtsi

@@ -286,20 +286,6 @@
 				status = "disabled";
 			};
 
-			pinctl0: pinctl@13830 { /* north bridge */
-				compatible = "marvell,armada-3700-pinctl";
-				bank-name = "armada-3700-nb";
-				reg = <0x13830 0x4>;
-				pin-count = <36>;
-			};
-
-			pinctl1: pinctl@18830 { /* south bridge */
-				compatible = "marvell,armada-3700-pinctl";
-				bank-name = "armada-3700-sb";
-				reg = <0x18830 0x4>;
-				pin-count = <30>;
-			};
-
 			comphy: comphy@18300 {
 				compatible = "marvell,mvebu-comphy", "marvell,comphy-armada-3700";
 				reg = <0x18300 0x28>,