mcux: readme: update patch list

add the patch that implementing the uhc_mcux

Signed-off-by: Mark Wang <yichang.wang@nxp.com>

Author: MarkWangChinese

mcux/README

@@ -79,3 +79,8 @@ Patch List:
   12. devices: LPC55S36: Changed FSL_FEATURE_PWM_HAS_NO_WAITEN from 1 to 0 to solve pwm issue.
   13. devices: MIMX8UD7: add definition for LPUART_RX_TX_IRQS
   14. devices: MCXN947: clock: Updated the clock frequency, case 3 on GetWdtClkFreq returns 1MHZ
+  15. Add usb_host_mcux_drv_port.h file for using MCUX SDK USB host controller driver easily in Zephyr.
+      - usb_host_mcux_drv_port.h contains the simplified structs, enums and APIs that MCUX SDK USB host controller drivers need.
+      - Update usb_host_ehci.c and usb_host_khci.c if in Zephyr environment.
+        - Add include of usb_host_mcux_drv_port.h.
+        - Remove include of usb_host.h, usb_host_hci.h, usb_host_devices.h and usb_host_framework.h.