soc: LPC55S69: Add USB support

1. Update soc.c file to add USB clock setup
2. Add a linker script file to move USB transfer
   buffer and controller buffers to USB RAM
3. Update Kconfig's to add USB support
4. Add zephyr_udc0 nodelabel

Signed-off-by: Mahesh Mahadevan <mahesh.mahadevan@nxp.com>

boards/arm/lpcxpresso55s69/doc/index.rst

@@ -80,6 +80,8 @@ features:
 +-----------+------------+-------------------------------------+
 | HWINFO    | on-chip    | Unique device serial number         |
 +-----------+------------+-------------------------------------+
+| USB       | on-chip    | USB device                          |
++-----------+------------+-------------------------------------+
 
 Targets available
 ==================

boards/arm/lpcxpresso55s69/lpcxpresso55s69_cpu0.dts

@@ -105,3 +105,7 @@
 &mailbox0 {
 	status = "okay";
 };
+
+zephyr_udc0: &usbhs {
+	status = "okay";
+};

boards/arm/lpcxpresso55s69/lpcxpresso55s69_cpu0.yaml

@@ -22,4 +22,5 @@ supported:
   - gpio
   - i2c
   - spi
+  - usb_device
   - watchdog

boards/arm/lpcxpresso55s69/lpcxpresso55s69_ns.dts

@@ -103,3 +103,7 @@
 	dma-channels = <20>;
 	status = "okay";
 };
+
+zephyr_udc0: &usbhs {
+	status = "okay";
+};