wscons: Move to its own device type

This reduces ifdefs and avoids overloading evdev as something it is not.

common/wscons.c

@@ -0,0 +1,27 @@
+#include <stdlib.h>
+#include <string.h>
+
+#if defined(__NetBSD__)
+#include <stdlib.h>
+#include <sys/stat.h>
+#endif
+
+#include "wscons.h"
+
+#define STRLEN(s) ((sizeof(s) / sizeof(s[0])) - 1)
+
+#if defined(__NetBSD__)
+int path_is_wscons(const char *path) {
+	const char *wskbd = "/dev/wskbd";
+	const char *wsmouse = "/dev/wsmouse";
+	const char *wsmux = "/dev/wsmux";
+	return strncmp(path, wskbd, STRLEN(wskbd)) == 0 ||
+	       strncmp(path, wsmouse, STRLEN(wsmouse)) == 0 ||
+	       strncmp(path, wsmux, STRLEN(wsmouse)) == 0;
+}
+#else
+int path_is_wscons(const char *path) {
+	(void)path;
+	return 0;
+}
+#endif