STM32F7 QSPI flash timeouts and 4-byte addressing (#152)

* STM32F7: Unconditionally enable QSPI workarounds

On the STM32769NI at least this patch is required for stable QSPI use.
Enable it uncondtionally in case other boards need it too.

Further discussions:

ARMmbed#10049
ARMmbed#15108

STMicroelectronics/STM32CubeF7#52
STMicroelectronics/STM32CubeF7#82

* QSPIF: Attempt 4-byte addressing on Macronix chips

mbed-os PR 11531 introduced 4-byte addressing in the QSPIF block device:

ARMmbed#11531

During testing it was found that this code broke on the NRF52840_DK and
DISCO_F769NI.

The NRF52840_DK controller seems unable to handle 4-byte addressing at
all and has been disabled entirely in another code section.

The DISCO_F769NI breakage was attributed to the flash chip but after more
research I believe this is related to the QSPI controller, not the 4-byte
addressing itself.

Now that the QSPI controller has a workaround, enable 4-byte addressing
again and hope it works fine this time.

Author: Jookia

storage/blockdevice/COMPONENT_QSPIF/source/QSPIFBlockDevice.cpp

@@ -1095,7 +1095,6 @@ int QSPIFBlockDevice::_handle_vendor_quirks()
             _needs_fast_mode = true;
             _num_status_registers = 3;
             _read_status_reg_2_inst = QSPIF_INST_RDCR;
-            _attempt_4_byte_addressing = false;
             break;
         case 0x9d:
             // ISSI devices have only one status register

targets/TARGET_STM/TARGET_STM32F7/STM32Cube_FW/STM32F7xx_HAL_Driver/stm32f7xx_hal_qspi.c

@@ -571,10 +571,8 @@ void HAL_QSPI_IRQHandler(QSPI_HandleTypeDef *hqspi)
         __HAL_DMA_DISABLE(hqspi->hdma);
       }
 
-#if  defined(QSPI1_V1_0)
       /* Clear Busy bit */
       HAL_QSPI_Abort_IT(hqspi);
-#endif
 
       /* Change state of QSPI */
       hqspi->State = HAL_QSPI_STATE_READY;
@@ -616,10 +614,8 @@ void HAL_QSPI_IRQHandler(QSPI_HandleTypeDef *hqspi)
         }
       }
 
-#if  defined(QSPI1_V1_0)
       /* Workaround - Extra data written in the FIFO at the end of a read transfer */
       HAL_QSPI_Abort_IT(hqspi);
-#endif
 
       /* Change state of QSPI */
       hqspi->State = HAL_QSPI_STATE_READY;
@@ -1021,10 +1017,8 @@ HAL_StatusTypeDef HAL_QSPI_Transmit(QSPI_HandleTypeDef *hqspi, uint8_t *pData, u
           /* Clear Transfer Complete bit */
           __HAL_QSPI_CLEAR_FLAG(hqspi, QSPI_FLAG_TC);
 
-#if  defined(QSPI1_V1_0)
           /* Clear Busy bit */
           status = HAL_QSPI_Abort(hqspi);
-#endif
         }
       }
 
@@ -1112,10 +1106,8 @@ HAL_StatusTypeDef HAL_QSPI_Receive(QSPI_HandleTypeDef *hqspi, uint8_t *pData, ui
           /* Clear Transfer Complete bit */
           __HAL_QSPI_CLEAR_FLAG(hqspi, QSPI_FLAG_TC);
 
-#if  defined(QSPI1_V1_0)
           /* Workaround - Extra data written in the FIFO at the end of a read transfer */
           status = HAL_QSPI_Abort(hqspi);
-#endif
         }
       }