mtd: spinand: gigadevice: Fix the get ecc status issue

Some GigaDevice ecc_get_status functions use on-stack buffer for
spi_mem_op causes spi_mem_check_op failing, fix the issue by using
spinand scratchbuf.

Fixes: c40c7a990a46 ("mtd: spinand: Add support for GigaDevice GD5F1GQ4UExxG")
Signed-off-by: Han Xu <[e-mail]>
Signed-off-by: Miquel Raynal <[e-mail]>
Link: https://lore.kernel.org/linux-mtd/[e-mail]

drivers/mtd/nand/spi/gigadevice.c

···
 {
 	u8 status2;
 	struct spi_mem_op op = SPINAND_GET_FEATURE_OP(GD5FXGQXXEXXG_REG_STATUS2,
-						      &status2);
+						      spinand->scratchbuf);
 	int ret;
 
 	switch (status & STATUS_ECC_MASK) {
···
 		 * report the maximum of 4 in this case
 		 */
 		/* bits sorted this way (3...0): ECCS1,ECCS0,ECCSE1,ECCSE0 */
+		status2 = *(spinand->scratchbuf);
 		return ((status & STATUS_ECC_MASK) >> 2) |
 			((status2 & STATUS_ECC_MASK) >> 4);
 
···
 {
 	u8 status2;
 	struct spi_mem_op op = SPINAND_GET_FEATURE_OP(GD5FXGQXXEXXG_REG_STATUS2,
-						      &status2);
+						      spinand->scratchbuf);
 	int ret;
 
 	switch (status & STATUS_ECC_MASK) {
···
 		 * 1 ... 4 bits are flipped (and corrected)
 		 */
 		/* bits sorted this way (1...0): ECCSE1, ECCSE0 */
+		status2 = *(spinand->scratchbuf);
 		return ((status2 & STATUS_ECC_MASK) >> 4) + 1;
 
 	case STATUS_ECC_UNCOR_ERROR: