arm64: defconfig: Enable MEGARAID_SAS

Our new dev board (Huawei D06CS) has a MegaRAID SAS HBA as the storage
controller, and we cannot access the HiSilicon SAS HBA, which we normally
use; so enable the driver config option so we can boot a distro with the
default defconfig.
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Wei Xu <xuwei5@hisilicon.com>

arch/arm64/configs/defconfig

@@ -226,6 +226,7 @@ CONFIG_BLK_DEV_SD=y
 CONFIG_SCSI_SAS_ATA=y
 CONFIG_SCSI_HISI_SAS=y
 CONFIG_SCSI_HISI_SAS_PCI=y
+CONFIG_MEGARAID_SAS=y
 CONFIG_SCSI_MPT3SAS=m
 CONFIG_SCSI_UFSHCD=y
 CONFIG_SCSI_UFSHCD_PLATFORM=y