staging:rtl8192u: Rename CmdID_WritePortUlong > CMD_ID_WRITE_PORT_ULONG

Rename enum label CmdID_WritePortUlong to CMD_ID_WRITE_PORT_ULONG to clear the
checkpatch CamelCase issue. Simple syle change which should not impact code
execution.

Signed-off-by: John Whitmore <johnfwhitmore@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>