NVMe: small typo in section BLK_DEV_NVME_SCSI of host/Kconfig

"as well as " is miss typed "as well a " in section
"config BLK_DEV_NVME_SCSI"
Signed-off-by: Wang Sheng-Hui <shhuiw@foxmail.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>

drivers/nvme/host/Kconfig

@@ -18,7 +18,7 @@ config BLK_DEV_NVME_SCSI
 	depends on NVME_CORE
 	---help---
 	  This adds support for the SG_IO ioctl on the NVMe character
-	  and block devices nodes, as well a a translation for a small
+	  and block devices nodes, as well as a translation for a small
 	  number of selected SCSI commands to NVMe commands to the NVMe
 	  driver.  If you don't know what this means you probably want
 	  to say N here, unless you run a distro that abuses the SCSI