Add USB mass storage only build set

buildset/umass.ini

@@ -0,0 +1,18 @@
+#
+# USB mass storage only.
+#
+
+[general]
+name = umass
+
+[modules]
+base = on
+cam = on
+dev_usb = on
+dev_usb_controller = on
+dev_usb_controller_bbb = on
+dev_usb_quirk = on
+dev_usb_storage = on
+fdt = on
+rtems = on
+user_space = on

rtemsbsd/include/rtems/bsd/local/opt_usb.h

@@ -1,3 +1,5 @@
+#include <rtems/bsd/modules.h>
+
 #define USB_HAVE_CONDVAR 1
 
 #define USB_HAVE_UGEN 1
@@ -8,7 +10,9 @@
 
 #define USB_HAVE_USER_IO 0
 
+#if defined(RTEMS_BSD_MODULE_NETINET) || defined(RTEMS_BSD_MODULE_NETINET6)
 #define USB_HAVE_MBUF 1
+#endif
 
 #undef USB_VERBOSE