staging: lustre: Fix typo in lustre/include

Fix spelling typo in comments within lustre/include.

Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/staging/lustre/include/linux/lnet/types.h b/drivers/staging/lustre/include/linux/lnet/types.h
index c833ce8..b19d988 100644
--- a/drivers/staging/lustre/include/linux/lnet/types.h
+++ b/drivers/staging/lustre/include/linux/lnet/types.h
@@ -181,7 +181,7 @@
 	 * address of an array of lnet_kiov_t and the length field specifies
 	 * the number of entries in the array. The length can't be bigger
 	 * than LNET_MAX_IOV. The lnet_kiov_t is used to describe page-based
-	 * fragments that are not necessarily mapped in virtal memory.
+	 * fragments that are not necessarily mapped in virtual memory.
 	 * - LNET_MD_IOVEC bit set: The start field points to the starting
 	 * address of an array of struct iovec and the length field specifies
 	 * the number of entries in the array. The length can't be bigger