usb_cdc: Rename usb_request_bootloader() to bootloader_request()

Rename this board API function to a more generic name.  This is in
preparation for calling the function from the canbus code.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>

src/stm32/stm32f4.c

@@ -8,7 +8,7 @@
 #include "board/armcm_boot.h" // VectorTable
 #include "board/armcm_reset.h" // try_request_canboot
 #include "board/irq.h" // irq_disable
-#include "board/usb_cdc.h" // usb_request_bootloader
+#include "board/misc.h" // bootloader_request
 #include "command.h" // DECL_CONSTANT_STR
 #include "internal.h" // enable_pclock
 #include "sched.h" // sched_main
@@ -188,7 +188,7 @@ clock_setup(void)
 
 
 /****************************************************************
- * USB bootloader
+ * Bootloader
  ****************************************************************/
 
 // Reboot into USB "HID" bootloader
@@ -228,9 +228,9 @@ check_usb_dfu_bootloader(void)
                  : : "r"(sysbase[0]), "r"(sysbase[1]));
 }
 
-// Handle USB reboot requests
+// Handle reboot requests
 void
-usb_request_bootloader(void)
+bootloader_request(void)
 {
     try_request_canboot();
     if (CONFIG_STM32_FLASH_START_4000)