virutil: Fix compilation on non-linux platforms

There has been a typo in virIsCapbleVport function name.

src/util/virutil.c

@@ -3590,7 +3590,7 @@ virIsCapableFCHost(const char *sysfs_prefix ATTRIBUTE_UNUSED,
 }
 
 int
-virIsCapbleVport(const char *sysfs_prefix ATTRIBUTE_UNUSED,
+virIsCapableVport(const char *sysfs_prefix ATTRIBUTE_UNUSED,
                   int host ATTRIBUTE_UNUSED)
 {
     virReportSystemError(ENOSYS, "%s", _("Not supported on this platform"));