Extend boardctl() USB device control to include PL2303 serial

TODO

@@ -469,14 +469,12 @@ o Kernel/Protected Build
                These functions call directly into operating system functions
                like:
 
-                 - usbdev_serialinitialize - Called in apps/examples/usbserial,
-                   apps/examples/usbterm
                  - cdcacm_classobject - Called from apps/system/composite.
-                 - usbmsc_configure - Called fromo apps/system/usbmsc and
+                 - usbmsc_configure - Called from apps/system/usbmsc and
                    apps/system/composite
-                 - usbmsc_bindlun - Called fromo apps/system/usbmsc and
+                 - usbmsc_bindlun - Called from apps/system/usbmsc and
                    apps/system/composite
-                 - usbmsc_exportluns - Called fromo apps/system/usbmsc.
+                 - usbmsc_exportluns - Called from apps/system/usbmsc.
 
   Status:      Open
   Priority:    Medium/High -- the kernel build configuration is not fully fielded

arch @ 9da37a09

-Subproject commit e0727147413b44e3c263abe8df70542dfa6b1edb
+Subproject commit 9da37a0989a52853fe27bb4acadf52dc155e7440

configs @ 7d4cd683

-Subproject commit 132d630c0fdbc793ad5a1438879ae50a399044e0
+Subproject commit 7d4cd683fe8b2a6be2bf9d25c91afefa877a50bf

include/sys/boardctl.h

@@ -228,6 +228,9 @@ enum boardioc_usbdev_identifier_e
 #ifdef CONFIG_CDCACM
   , BOARDIOC_USBDEV_CDCACM        /* CDC/ACM */
 #endif
+#ifdef CONFIG_PL2303
+  , BOARDIOC_USBDEV_PL2303        /* PL2303 serial */
+#endif
 #ifdef CONFIG_USBMSC
   , BOARDIOC_USBDEV_MSC           /* Mass storage class */
 #endif