snd_ess needs snd_sbc

[Oliver Lehmann]

Hi,

with "sound" and "snd_ess" in kernelconfig:

ess.o(.text+0x17): In function `ess_lock':
/usr/src/sys/dev/sound/isa/ess.c:140: undefined reference to `sbc_lock'
ess.o(.text+0x37): In function `ess_unlock':
/usr/src/sys/dev/sound/isa/ess.c:146: undefined reference to `sbc_unlock'

For me it looks like snd_ess needs snd_sbc - shouldn't that been
documented somehow?

-- 
 Oliver Lehmann
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