Teensy 3.5: do not restart USB stack after wakeup (#19269)

platforms/chibios/boards/PJRC_TEENSY_3_5/board/board.mk

@@ -0,0 +1,11 @@
+include $(CHIBIOS_CONTRIB)/os/hal/boards/PJRC_TEENSY_3_5/board.mk
+
+# List of all the board related files.
+BOARDSRC += $(BOARD_PATH)/board/extra.c
+
+# Required include directories
+BOARDINC += $(BOARD_PATH)/board
+
+# Shared variables
+ALLCSRC += $(BOARDSRC)
+ALLINC  += $(BOARDINC)

platforms/chibios/boards/PJRC_TEENSY_3_5/board/extra.c

@@ -0,0 +1,7 @@
+#include <hal.h>
+
+void restart_usb_driver(USBDriver *usbp) {
+    // Do nothing. Restarting the USB driver on the Teensy 3.6 breaks it,
+    // resulting in a keyboard which can wake up a PC from Suspend-to-RAM, but
+    // does not actually produce any keypresses until you un-plug and re-plug.
+}