STM32WB: Update Flash size

the flash is shared and split between cortex-M4 that
runs (mbed-os) application and the cortex-M0+ that
runs the BLE firmware.

The 512K allocated to the application was a
conservative that can now be updated.

With recent up-to-date BLE firmware flashed @ 0x080CB000,
there should be 812K available to application.

But there are boards out there that don't have an up-to-date
firmware, so we're keeping an intermediate, safer,
application size of 768K.

Author: LMESTM

targets/TARGET_STM/TARGET_STM32WB/TARGET_STM32WB55xG/device/TOOLCHAIN_ARM_MICRO/stm32wb55xx.sct

@@ -34,11 +34,11 @@
 #endif
 
 #if !defined(MBED_APP_SIZE)
-; 512KB FLASH
-#define MBED_APP_SIZE 0x80000
+; 812KB FLASH
+#define MBED_APP_SIZE 0xC0000
 #endif
 
-; 512KB FLASH (0x80000) + 192KB SRAM (0x30000) +  Shared mem
+; 768KB FLASH (0xC0000) + 192KB SRAM (0x30000) +  Shared mem
 LR_IROM1 MBED_APP_START MBED_APP_SIZE  {    ; load region size_region
 
   ER_IROM1 MBED_APP_START MBED_APP_SIZE  {  ; load address = execution address

targets/TARGET_STM/TARGET_STM32WB/TARGET_STM32WB55xG/device/TOOLCHAIN_ARM_STD/stm32wb55xx.sct

@@ -34,8 +34,8 @@
 #endif
 
 #if !defined(MBED_APP_SIZE)
-; 512KB FLASH
-#define MBED_APP_SIZE 0x80000
+; 768KB FLASH
+#define MBED_APP_SIZE 0xC0000
 #endif
 
 #if !defined(MBED_BOOT_STACK_SIZE)
@@ -44,7 +44,7 @@
 
 #define Stack_Size MBED_BOOT_STACK_SIZE
 
-; 512KB FLASH (0x80000) + 192KB SRAM (0x30000) +  Shared mem
+; 768KB FLASH (0xC0000) + 192KB SRAM (0x30000) +  Shared mem
 LR_IROM1 MBED_APP_START MBED_APP_SIZE  {    ; load region size_region
 
   ER_IROM1 MBED_APP_START MBED_APP_SIZE  {  ; load address = execution address

targets/TARGET_STM/TARGET_STM32WB/TARGET_STM32WB55xG/device/TOOLCHAIN_GCC_ARM/stm32wb55xx.ld

@@ -3,7 +3,7 @@
 #endif
 
 #if !defined(MBED_APP_SIZE)
-#define MBED_APP_SIZE 512K
+#define MBED_APP_SIZE 768K
 #endif
 
 #if !defined(MBED_BOOT_STACK_SIZE)

targets/TARGET_STM/TARGET_STM32WB/TARGET_STM32WB55xG/device/TOOLCHAIN_IAR/stm32wb55xx.icf

@@ -17,9 +17,9 @@
  */
 
 if (!isdefinedsymbol(MBED_APP_START)) { define symbol MBED_APP_START = 0x08000000; }
-if (!isdefinedsymbol(MBED_APP_SIZE)) { define symbol MBED_APP_SIZE = 0x80000; }
+if (!isdefinedsymbol(MBED_APP_SIZE)) { define symbol MBED_APP_SIZE = 0xC0000; }
 
-/* [ROM = 512kb = 0x80000] */
+/* [ROM = 768kb = 0xC0000] */
 define symbol __intvec_start__     = MBED_APP_START;
 define symbol __region_ROM_start__ = MBED_APP_START;
 define symbol __region_ROM_end__   = MBED_APP_START + MBED_APP_SIZE - 1;