[bsp][stm32/libraries] 修复 drv_flash_l4.c 驱动中无法写入非8字节对齐的数据的限制

Signed-off-by: MurphyZhao <d2014zjt@163.com>

bsp/stm32/libraries/HAL_Drivers/drv_flash/drv_flash_l4.c

@@ -140,12 +140,6 @@ int stm32_flash_write(rt_uint32_t addr, const uint8_t *buf, size_t size)
         return -RT_EINVAL;
     }
 
-    if(size % 8 != 0)
-    {
-        LOG_E("write size must be 8-byte alignment");
-        return -RT_EINVAL;
-    }
-
     HAL_FLASH_Unlock();
 
     __HAL_FLASH_CLEAR_FLAG(FLASH_FLAG_EOP | FLASH_FLAG_OPERR | FLASH_FLAG_WRPERR | FLASH_FLAG_PGAERR | FLASH_FLAG_PGSERR);