pbb: Add pbb debug_cable signal to hog

Also merge bootselect and UART_TXEN for pbb, but untested.
BCS 746-001288

arch/arm/dts/kuk-trizeps8plus.dts

@@ -21,6 +21,15 @@
 
 &iomuxc {
 	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_hog_1>;
+
+	pinctrl_hog_1: hoggrp-1 {
+		fsl,pins = <
+			MX8MP_IOMUXC_SAI5_RXD2__GPIO3_IO23	    0x00000016   // DEBUG_CABLE on pbb for Plus, No Pulldown, has external pulldown on pbb
+			MX8MP_IOMUXC_SAI1_RXD7__GPIO4_IO09	    0x00000156   // SW bootselect on PBB, requires pull up
+			MX8MP_IOMUXC_SAI2_RXC__GPIO4_IO22	    0x00000116   // UART1_TXEN on PBB, Pulldown to keep RS485 disabled on pbb during boot
+		>;
+	};
 
 	pinctrl_eqos: eqosgrp {
 		fsl,pins = <