bsps/stm32h7: Honor the intent of the MPU alignment option

Currently, if a BSP is built without MPU alignment enforcement, the MPU
is still enabled and can produce a non-functional binary since code can
be mixed with data within a memory region and memory regions are marked
as read-only or no-execute based on section addresses and sizes leading
to overlapping regions being defined which causes the later-defined
region to take precedence. This change disables the MPU when alignment
is not enforced, allowing the binary to function.

bsps/arm/stm32h7/boards/stm/nucleo-h743zi/stm32h7-bspstarthooks.c

@@ -62,8 +62,10 @@ void bsp_start_hook_0(void)
     SCB_EnableDCache();
   }
 
+#ifdef STM32H7_ENABLE_MPU_ALIGNMENT
   _ARMV7M_MPU_Setup(ARMV7M_MPU_CTRL_DEFAULT, stm32h7_config_mpu_region, stm32h7_config_mpu_region_count);
 #endif
+#endif
 }
 
 void bsp_start_hook_1(void)

bsps/arm/stm32h7/boards/stm/nucleo-h755zi/stm32h7-bspstarthooks.c

@@ -62,8 +62,10 @@ void bsp_start_hook_0(void)
     SCB_EnableDCache();
   }
 
+#ifdef STM32H7_ENABLE_MPU_ALIGNMENT
   _ARMV7M_MPU_Setup(ARMV7M_MPU_CTRL_DEFAULT, stm32h7_config_mpu_region, stm32h7_config_mpu_region_count);
 #endif
+#endif
 }
 
 void bsp_start_hook_1(void)

bsps/arm/stm32h7/boards/stm/stm32h743i-eval/stm32h7-bspstarthooks.c

@@ -63,8 +63,10 @@ void bsp_start_hook_0(void)
     SCB_EnableDCache();
   }
 
+#ifdef STM32H7_ENABLE_MPU_ALIGNMENT
   _ARMV7M_MPU_Setup(ARMV7M_MPU_CTRL_DEFAULT, stm32h7_config_mpu_region, stm32h7_config_mpu_region_count);
 #endif
+#endif
 }
 
 void bsp_start_hook_1(void)

bsps/arm/stm32h7/boards/stm/stm32h747i-disco/stm32h7-bspstarthooks.c

@@ -63,8 +63,10 @@ void bsp_start_hook_0(void)
     SCB_EnableDCache();
   }
 
+#ifdef STM32H7_ENABLE_MPU_ALIGNMENT
   _ARMV7M_MPU_Setup(ARMV7M_MPU_CTRL_DEFAULT, stm32h7_config_mpu_region, stm32h7_config_mpu_region_count);
 #endif
+#endif
 }
 
 void bsp_start_hook_1(void)

bsps/arm/stm32h7/boards/stm/stm32h757i-eval/stm32h7-bspstarthooks.c

@@ -79,8 +79,10 @@ void bsp_start_hook_0(void)
     SCB_EnableDCache();
   }
 
+#ifdef STM32H7_ENABLE_MPU_ALIGNMENT
   _ARMV7M_MPU_Setup(ARMV7M_MPU_CTRL_DEFAULT, stm32h7_config_mpu_region, stm32h7_config_mpu_region_count);
 #endif
+#endif
 }
 
 void bsp_start_hook_1(void)

bsps/arm/stm32h7/boards/stm/stm32h7b3i-dk/stm32h7-bspstarthooks.c

@@ -63,8 +63,10 @@ void bsp_start_hook_0(void)
     SCB_EnableDCache();
   }
 
+#ifdef STM32H7_ENABLE_MPU_ALIGNMENT
   _ARMV7M_MPU_Setup(ARMV7M_MPU_CTRL_DEFAULT, stm32h7_config_mpu_region, stm32h7_config_mpu_region_count);
 #endif
+#endif
 }
 
 void bsp_start_hook_1(void)