arm64: dts: marvell: armada-37xx: Fix reg for standard variant of UART

UART1 (standard variant with DT node name 'uart0') has register space
0x12000-0x12018 and not whole size 0x200. So fix also this in example.
Signed-off-by: NPali Rohár <pali@kernel.org>
Fixes: c737abc1 ("arm64: dts: marvell: Fix A37xx UART0 register size")
Link: https://lore.kernel.org/r/20210624224909.6350-6-pali@kernel.orgSigned-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

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

@@ -134,7 +134,7 @@
 
 			uart0: serial@12000 {
 				compatible = "marvell,armada-3700-uart";
-				reg = <0x12000 0x200>;
+				reg = <0x12000 0x18>;
 				clocks = <&xtalclk>;
 				interrupts =
 				<GIC_SPI 11 IRQ_TYPE_LEVEL_HIGH>,