Return a list of all available kernel modules

    CLI Example:

    .. code-block:: bash

        salt '*' kmod.available

def available():
    '''
    Return a list of all available kernel modules

    CLI Example:

    .. code-block:: bash

        salt '*' kmod.available
    '''
    ret = []
    for path in __salt__['file.find']('/boot/kernel', name='*.ko$'):
        bpath = os.path.basename(path)
        comps = bpath.split('.')
        if 'ko' in comps:
            # This is a kernel module, return it without the .ko extension
            ret.append('.'.join(comps[:comps.index('ko')]))
    return ret