9p: typo fixes and minor cleanups

Typo fixes and minor cleanups for v9fs

Signed-off-by: Rob Landley <rob@landley.net>
Reviewed-by: Venkateswararao Jujjuri (JV) <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
diff --git a/include/net/9p/9p.h b/include/net/9p/9p.h
index d2df55b..104fec3 100644
--- a/include/net/9p/9p.h
+++ b/include/net/9p/9p.h
@@ -241,10 +241,10 @@
 
 /**
  * enum p9_perm_t - 9P permissions
- * @P9_DMDIR: mode bite for directories
+ * @P9_DMDIR: mode bit for directories
  * @P9_DMAPPEND: mode bit for is append-only
  * @P9_DMEXCL: mode bit for excluse use (only one open handle allowed)
- * @P9_DMMOUNT: mode bite for mount points
+ * @P9_DMMOUNT: mode bit for mount points
  * @P9_DMAUTH: mode bit for authentication file
  * @P9_DMTMP: mode bit for non-backed-up files
  * @P9_DMSYMLINK: mode bit for symbolic links (9P2000.u)
@@ -362,7 +362,7 @@
 };
 
 /**
- * struct p9_stat - file system metadata information
+ * struct p9_wstat - file system metadata information
  * @size: length prefix for this stat structure instance
  * @type: the type of the server (equivalent to a major number)
  * @dev: the sub-type of the server (equivalent to a minor number)
@@ -687,10 +687,10 @@
  * @size: prefixed length of the structure
  * @id: protocol operating identifier of type &p9_msg_t
  * @tag: transaction id of the request
- * @offset: used by marshalling routines to track currentposition in buffer
+ * @offset: used by marshalling routines to track current position in buffer
  * @capacity: used by marshalling routines to track total malloc'd capacity
  * @pubuf: Payload user buffer given by the caller
- * @pubuf: Payload kernel buffer given by the caller
+ * @pkbuf: Payload kernel buffer given by the caller
  * @pbuf_size: pubuf/pkbuf(only one will be !NULL) size to be read/write.
  * @private: For transport layer's use.
  * @sdata: payload