[D18] add PCIe support

* for test on carrier B79: connector CN32 - jumper CN67 position 3-5

arch/arm64/boot/dts/seco/seco-imx8mp-d18.dts

@@ -523,6 +523,7 @@ wifi_wake_host {
 &pcie_ep{
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_pcie>;
+	reset-gpio = <&gpio2 7 GPIO_ACTIVE_LOW>;
 	ext_osc = <1>;
 	clocks = <&clk IMX8MP_CLK_HSIO_ROOT>,
 		 <&clk IMX8MP_CLK_PCIE_AUX>,
@@ -833,10 +834,8 @@ MX8MP_IOMUXC_GPIO1_IO08__GPIO1_IO08	0x16
 
 	pinctrl_pcie: pciegrp {
 		fsl,pins = <
-			MX8MP_IOMUXC_I2C4_SCL__PCIE_CLKREQ_B		0x61 /* open drain, pull up */
-			MX8MP_IOMUXC_SD1_DATA4__GPIO2_IO06		0x41
-			MX8MP_IOMUXC_SD1_DATA5__GPIO2_IO07		0x41
-			MX8MP_IOMUXC_I2C4_SDA__GPIO5_IO21		0x1c4
+			MX8MP_IOMUXC_I2C4_SCL__PCIE_CLKREQ_B	0x61 /* open drain, pull up */
+			MX8MP_IOMUXC_SD1_DATA5__GPIO2_IO07  	0x19
 		>;
 	};