staging: lustre/lnet: Fix wrong typecasting warning generated by sparse

Fix the following warning generated about type casting by sparse

warning: cast removes address space of expression

The current implementation casts the structure pointers with (char *)
without __user annotation and then adds sizeof struct to it, thereby
generating the sparse warning. Fixed this by removing the unnecessary
char pointer type cast.
Signed-off-by: Niranjan Dighe <niranjan.dighe@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/lustre/lnet/selftest/console.c

@@ -1462,10 +1462,8 @@ lstcon_statrpc_readent(int transop, srpc_msg_t *msg,
 		return 0;
 
 	sfwk_stat = (sfw_counters_t __user *)&ent_up->rpe_payload[0];
-	srpc_stat = (srpc_counters_t __user *)
-				      ((char *)sfwk_stat + sizeof(*sfwk_stat));
-	lnet_stat = (lnet_counters_t __user *)
-				      ((char *)srpc_stat + sizeof(*srpc_stat));
+	srpc_stat = (srpc_counters_t __user *)(sfwk_stat + 1);
+	lnet_stat = (lnet_counters_t __user *)(srpc_stat + 1);
 
 	if (copy_to_user(sfwk_stat, &rep->str_fw, sizeof(*sfwk_stat)) ||
 	    copy_to_user(srpc_stat, &rep->str_rpc, sizeof(*srpc_stat)) ||