Chibios: fix STM32_BOOTLOADER_ADDRESS name.

Author: flabbergast

tool/chibios/common.mk

@@ -80,6 +80,6 @@ endif
 OPT_DEFS += -DVERSION=$(shell (git describe --always --dirty || echo 'unknown') 2> /dev/null)
 
 # Bootloader address
-ifdef BOOTLOADER_ADDRESS
-    OPT_DEFS += -DBOOTLOADER_ADDRESS=$(BOOTLOADER_ADDRESS)
+ifdef STM32_BOOTLOADER_ADDRESS
+    OPT_DEFS += -DSTM32_BOOTLOADER_ADDRESS=$(STM32_BOOTLOADER_ADDRESS)
 endif