【修复】f0 f1 f4 f7 系列 flash 擦除函数返回值与 fal 接口不匹配的问题

bsp/stm32/libraries/HAL_Drivers/drv_flash/drv_flash_f0.c

@@ -167,7 +167,7 @@ __exit:
     }
 
     LOG_D("erase done: addr (0x%p), size %d", (void *)addr, size);
-    return result;
+    return size;
 }
 
 #if defined(PKG_USING_FAL)

bsp/stm32/libraries/HAL_Drivers/drv_flash/drv_flash_f1.c

@@ -167,7 +167,7 @@ __exit:
     }
 
     LOG_D("erase done: addr (0x%p), size %d", (void *)addr, size);
-    return result;
+    return size;
 }
 
 #if defined(PKG_USING_FAL)

bsp/stm32/libraries/HAL_Drivers/drv_flash/drv_flash_f4.c

@@ -310,7 +310,7 @@ __exit:
     }
 
     LOG_D("erase done: addr (0x%p), size %d", (void*)addr, size);
-    return result;
+    return size;
 }
 
 #if defined(PKG_USING_FAL)

bsp/stm32/libraries/HAL_Drivers/drv_flash/drv_flash_f7.c

@@ -382,7 +382,7 @@ __exit:
     }
 
     LOG_D("erase done: addr (0x%p), size %d", (void *)addr, size);
-    return result;
+    return size;
 }
 
 #if defined(PKG_USING_FAL)