ipc/msg.c: Adjust indentation in ksys_msgctl

Clang warns:

../ipc/msg.c:621:4: warning: misleading indentation; statement is not
part of the previous 'if' [-Wmisleading-indentation]
                 return msgctl_down(ns, msqid, cmd, &msqid64.msg_perm,
msqid64.msg_qbytes);
                 ^
../ipc/msg.c:619:3: note: previous statement is here
                if (copy_msqid_from_user(&msqid64, buf, version))
                ^
1 warning generated.

This warning occurs because there is a space after the tab on this line.
Remove it so that the indentation is consistent with the Linux kernel
coding style and clang no longer warns.

Link: ClangBuiltLinux#829
Link: http://lkml.kernel.org/r/20191218032932.37479-1-natechancellor@gmail.com
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>

ipc/msg.c

@@ -618,7 +618,8 @@ static long ksys_msgctl(int msqid, int cmd, struct msqid_ds __user *buf, int ver
 	case IPC_SET:
 		if (copy_msqid_from_user(&msqid64, buf, version))
 			return -EFAULT;
-		 return msgctl_down(ns, msqid, cmd, &msqid64.msg_perm, msqid64.msg_qbytes);
+		return msgctl_down(ns, msqid, cmd, &msqid64.msg_perm,
+				   msqid64.msg_qbytes);
 	case IPC_RMID:
 		return msgctl_down(ns, msqid, cmd, NULL, 0);
 	default: