nfsdtop: Fix for kernel since 5.15

Linux 54357f0c9149 ("tracing: Add migrate-disabled counter to tracing
output") added a new counter to the tracing output. Fix expected format.

nfsdtop/nfsdtop

@@ -125,7 +125,7 @@ sub analyze_trace {
 	open my $p,'<','/sys/kernel/debug/tracing/instances/nfsdtop/trace' or die "/sys/kernel/debug/tracing/instances/nfsdtop/trace: $!\n";
 	while (<$p>) {
 		/^#/ and next;
-		my ($taskpid,$cpu,$flags,$time,$op,$addr,$uid,$rest) = /^\s*(\S+)\s+\[(\d+)\]\s+(....)\s+(\d+\.\d*):\s*nfsd4_(\S+): ip=0x(........) uid=(\d+)\s*(.*)/ or die "format: $_";
+		my ($taskpid,$cpu,$flags,$time,$op,$addr,$uid,$rest) = /^\s*(\S+)\s+\[(\d+)\]\s+(.....?)\s+(\d+\.\d*):\s*nfsd4_(\S+): ip=0x(........) uid=(\d+)\s*(.*)/ or die "format: $_";
 		my $u32=
 		my $ip=hostname_by_u32(hex($addr));
 		my $user=getuser($uid);