Kernel: Add the SIOCATMARK ioctl request macro

This is not actually implemented at the moment, as we do not support
sending or receiving out-of-band data at all currently, but it is
required for some ports to compile.

Userland/Libraries/LibC/sys/ioctl_numbers.h

@@ -93,6 +93,7 @@ enum IOCtlNumber {
     KEYBOARD_IOCTL_SET_NUM_LOCK,
     KEYBOARD_IOCTL_GET_CAPS_LOCK,
     KEYBOARD_IOCTL_SET_CAPS_LOCK,
+    SIOCATMARK,
     SIOCSIFADDR,
     SIOCGIFADDR,
     SIOCGIFHWADDR,
@@ -141,6 +142,7 @@ enum IOCtlNumber {
 #define KEYBOARD_IOCTL_SET_NUM_LOCK KEYBOARD_IOCTL_SET_NUM_LOCK
 #define KEYBOARD_IOCTL_GET_CAPS_LOCK KEYBOARD_IOCTL_GET_CAPS_LOCK
 #define KEYBOARD_IOCTL_SET_CAPS_LOCK KEYBOARD_IOCTL_SET_CAPS_LOCK
+#define SIOCATMARK SIOCATMARK
 #define SIOCSIFADDR SIOCSIFADDR
 #define SIOCGIFADDR SIOCGIFADDR
 #define SIOCGIFHWADDR SIOCGIFHWADDR