arm64: dts: marvell: 37xx: remove empty line

Cosmetic patch removing an empty line at the end of the NB pinctrl node.
Signed-off-by: Antoine Tenart <antoine.tenart@free-electrons.com>
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>

arch/arm64/boot/dts/marvell/armada-37xx.dtsi

@@ -183,7 +183,6 @@ gpionb: gpio {
 					<GIC_SPI 153 IRQ_TYPE_LEVEL_HIGH>,
 					<GIC_SPI 154 IRQ_TYPE_LEVEL_HIGH>,
 					<GIC_SPI 155 IRQ_TYPE_LEVEL_HIGH>;
-
 				};
 
 				xtalclk: xtal-clk {