HAL_ChibiOS: use -O3 on boards with 2M flash

libraries/AP_HAL_ChibiOS/hwdef/CubeH7/hwdef.dat

@@ -12,6 +12,9 @@ APJ_BOARD_ID 139
 
 FLASH_SIZE_KB 2048
 
+# with 2M flash we can afford to optimize for speed
+env OPTIMIZE -O3
+
 FLASH_RESERVE_START_KB 128
 
 # board voltage

libraries/AP_HAL_ChibiOS/hwdef/Pixhawk4Pro/hwdef.dat

@@ -12,6 +12,9 @@ APJ_BOARD_ID 139
 
 FLASH_SIZE_KB 2048
 
+# with 2M flash we can afford to optimize for speed
+env OPTIMIZE -O3
+
 # bootloader takes first sector
 FLASH_RESERVE_START_KB 128
 

libraries/AP_HAL_ChibiOS/hwdef/fmuv4/hwdef.dat

@@ -21,6 +21,8 @@ STM32_ST_USE_TIMER 5
 # flash size
 FLASH_SIZE_KB 2048
 
+env OPTIMIZE -O3
+
 # serial port for stdout disabled, use USB console
 # STDOUT_SERIAL SD7
 # STDOUT_BAUDRATE 57600

libraries/AP_HAL_ChibiOS/hwdef/fmuv5/hwdef.dat

@@ -30,6 +30,8 @@ STM32_VDD 330U
 # flash size
 FLASH_SIZE_KB 2048
 
+env OPTIMIZE -O3
+
 # order of UARTs (and USB)
 UART_ORDER OTG1 USART1 USART2 USART3 UART4 USART6 UART7