Serial support is ENABLED by default

In fact serial support is needed by drivers that are not using serial
smart card readers.
For example virtualsmartcard
https://frankmorgner.github.io/vsmartcard/virtualsmartcard/README.html

Thanks to Jakub Jelen for the notice
"[Pcsclite-muscle] (possible) evolutions of pcsc-lite and libccid"
https://lists.infradead.org/pipermail/pcsclite-muscle/2024-May/001486.html

meson.options

@@ -21,7 +21,7 @@ option('usb',
 
 option('serial',
   type : 'boolean',
-  value : false,
+  value : true,
   description : 'Support serial readers')
 
 option('serialconfdir',