Merge pull request #533 from Serasidis/master

STM32F407 BKPSRAM Boundary address fix

Author: rogerclarkmelbourne

STM32F4/cores/maple/libmaple/bkp.h

@@ -99,7 +99,7 @@ typedef struct bkp_reg_map {
 } bkp_reg_map;
 
 /** Backup peripheral register map base pointer. */
-#define BKP_BASE                        ((struct bkp_reg_map*)0x40006C00)
+#define BKP_BASE                        ((struct bkp_reg_map*)0x40024000)
 
 /** Backup peripheral device type. */
 typedef struct bkp_dev {