scsi: megaraid: use ktime_get_real for firmware time

do_gettimeofday() overflows in 2038 on 32-bit architectures and is
deprecated, so convert this driver to call ktime_get_real()
directly. This also simplifies the calculation.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Sumit Saxena <sumit.saxena@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/megaraid/megaraid_sas_fusion.c

@@ -983,7 +983,7 @@ megasas_ioc_init_fusion(struct megasas_instance *instance)
 	MFI_CAPABILITIES *drv_ops;
 	u32 scratch_pad_2;
 	unsigned long flags;
-	struct timeval tv;
+	ktime_t time;
 	bool cur_fw_64bit_dma_capable;
 
 	fusion = instance->ctrl_context;
@@ -1042,10 +1042,9 @@ megasas_ioc_init_fusion(struct megasas_instance *instance)
 	IOCInitMessage->HostMSIxVectors = instance->msix_vectors;
 	IOCInitMessage->HostPageSize = MR_DEFAULT_NVME_PAGE_SHIFT;
 
-	do_gettimeofday(&tv);
+	time = ktime_get_real();
 	/* Convert to milliseconds as per FW requirement */
-	IOCInitMessage->TimeStamp = cpu_to_le64((tv.tv_sec * 1000) +
-						(tv.tv_usec / 1000));
+	IOCInitMessage->TimeStamp = cpu_to_le64(ktime_to_ms(time));
 
 	init_frame = (struct megasas_init_frame *)cmd->frame;
 	memset(init_frame, 0, IOC_INIT_FRAME_SIZE);