scsi: qla2xxx: make 1-bit bit-fields unsigned int

The bitfields mpi_fw_dump_reading and mpi_fw_dumped are currently signed
which is not recommended as the representation is an implementation defined
behaviour.  Fix this by making the bit-fields unsigned ints.

Link: https://lore.kernel.org/r/20200428102013.1040598-1-colin.king@canonical.com
Fixes: cbb01c2f ("scsi: qla2xxx: Fix MPI failure AEN (8200) handling")
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/qla2xxx/qla_def.h

@@ -4248,8 +4248,8 @@ struct qla_hw_data {
 	int		fw_dump_reading;
 	void		*mpi_fw_dump;
 	u32		mpi_fw_dump_len;
-	int		mpi_fw_dump_reading:1;
-	int		mpi_fw_dumped:1;
+	unsigned int	mpi_fw_dump_reading:1;
+	unsigned int	mpi_fw_dumped:1;
 	int		prev_minidump_failed;
 	dma_addr_t	eft_dma;
 	void		*eft;