UBUNTU: [Config] re-enable OSS support and blacklist

We are seeing requests for the OSS support to be reenabled, it seems that
it is needed for old games.  We do not want it loading by default so use
the new blacklist support to suppress autoloading.  This should bring us
into line with other distros where manual loading is required.

BugLink: http://bugs.launchpad.net/bugs/1434842Signed-off-by: Andy Whitcroft <apw@canonical.com>

debian.master/config/config.common.ubuntu

@@ -7230,7 +7230,8 @@ CONFIG_SND_OXYGEN=m
 CONFIG_SND_OXYGEN_LIB=m
 CONFIG_SND_PCI=y
 CONFIG_SND_PCMCIA=y
-# CONFIG_SND_PCM_OSS is not set
+CONFIG_SND_PCM_OSS=m
+CONFIG_SND_PCM_OSS_PLUGINS=y
 CONFIG_SND_PCSP=m
 CONFIG_SND_PCXHR=m
 CONFIG_SND_PDAUDIOCF=m

debian.master/modprobe.d/common.conf

+# LP:1434842 -- disable OSS drivers by default to allow pulseaudio to emulate
+blacklist snd-mixer-oss
+blacklist snd-pcm-oss