Add get_frontend capability.

Test:

SPACECAST2# dvbsnoop -s feinfo
dvbsnoop V1.4.50 -- http://dvbsnoop.sourceforge.net/

---------------------------------------------------------
FrontEnd Info...
---------------------------------------------------------

Device: /dev/dvb/adapter0/frontend0

Basic capabilities:
    Name: "Montage RS6000(DVBSky)"
    Frontend-type:       QPSK (DVB-S)
    Frequency (min):     950.000 MHz
    Frequency (max):     2150.000 MHz
    Frequency stepsiz:   1.011 MHz
    Frequency tolerance: 5.000 MHz
    Symbol rate (min):     1.000000 MSym/s
    Symbol rate (max):     45.000000 MSym/s
    Symbol rate tolerance: 0 ppm
    Notifier delay: 0 ms
    Frontend capabilities:
        auto inversion
        FEC 1/2
        FEC 2/3
        FEC 3/4
        FEC 4/5
        FEC 5/6
        FEC 6/7
        FEC 7/8
        FEC AUTO
        QPSK

Current parameters:
    Frequency:  1110.000 MHz
    Inversion:  OFF
    Symbol rate:  29.981256 MSym/s
    FEC:  FEC 3/4

Google-Bug-Id: 19432272
Change-Id: I108558a98d1387c855b2f40b2eb2dd14073b475c
1 file changed