flashmax.pl: fix typo and inconsistent indentation

$SYN had been typoed as $SYM.

Make the indentation of the control character symbols more consistent

tools/flashmax.pl

@@ -582,25 +582,25 @@ sub upload_fpgadata($$) {
 
     my($port, $fpgadata) = @_;
 
-    my $SOH = 001;
-    my $STX = 002;
-    my $ETX = 003;
-    my $EOT = 004;
-    my $ENQ = 005;
-    my $ACK = 006;
-    my $XON = 021;		# A.k.a. DC1
+    my $SOH  = 001;
+    my $STX  = 002;
+    my $ETX  = 003;
+    my $EOT  = 004;
+    my $ENQ  = 005;
+    my $ACK  = 006;
+    my $XON  = 021;		# A.k.a. DC1
     my $WRST = 022;		# DC2: window = 0
     my $XOFF = 023;		# A.k.a. DC3
-    my $WGO = 024;		# DC4: window += 256 bytes
-    my $NAK = 025;
-    my $SYM = 026;
-    my $ETB = 027;
-    my $CAN = 030;
-    my $EM  = 031;		# Packet offset too high
-    my $FS  = 034;
-    my $GS  = 035;
-    my $RS  = 036;
-    my $US  = 037;
+    my $WGO  = 024;		# DC4: window += 256 bytes
+    my $NAK  = 025;
+    my $SYN  = 026;
+    my $ETB  = 027;
+    my $CAN  = 030;
+    my $EM   = 031;		# Packet offset too high
+    my $FS   = 034;
+    my $GS   = 035;
+    my $RS   = 036;
+    my $US   = 037;
 
     my $WGO_CHUNK = 256;	# Each WGO = 256 bytes