media: dvb-frontends/stv0367: split SNR determination into functions
The read_snr() functions currently do some magic to return relative scale values when called. Split out register readouts into separate functions so the functionality can be reused in some other way. Signed-off-by: NDaniel Scheller <d.scheller@gmx.net> Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>
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