Fixing include files due to latest rebase

TESTS/mbed_hal/lp_ticker/main.cpp

@@ -21,6 +21,7 @@
 #include "lp_ticker_api_tests.h"
 #include "hal/lp_ticker_api.h"
 #include "hal/mbed_lp_ticker_wrapper.h"
+#include "hal/us_ticker_api.h"
 
 #if !DEVICE_LPTICKER
 #error [NOT_SUPPORTED] Low power timer not supported for this target

TESTS/usb_device/hid/main.cpp

@@ -27,6 +27,7 @@
 #include "USBHID.h"
 #include "USBMouse.h"
 #include "USBKeyboard.h"
+#include "hal/us_ticker_api.h"
 
 // Reuse the VID & PID from basic USB test.
 #define USB_HID_VID 0x0d28

TESTS/usb_device/serial/main.cpp

@@ -26,6 +26,7 @@
 #include "usb_phy_api.h"
 #include "USBCDC.h"
 #include "USBSerial.h"
+#include "hal/us_ticker_api.h"
 
 #define USB_CDC_VID 0x1f00
 #define USB_CDC_PID 0x2013