[source] kernel: add missing symbols for Linux 3.18 (like d2f4479870)

[LEDE Commits]

nbd pushed a commit to source.git, branch master:
https://git.lede-project.org/8a7a1b0029f200d4912fc2b5f940e1834cc22646

commit 8a7a1b0029f200d4912fc2b5f940e1834cc22646
Author: Felix Fietkau <nbd at nbd.name>
AuthorDate: Tue Oct 4 17:07:59 2016 +0200

    kernel: add missing symbols for Linux 3.18 (like d2f4479870)
    
    Signed-off-by: Felix Fietkau <nbd at nbd.name>
---
 target/linux/generic/config-3.18 | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/target/linux/generic/config-3.18 b/target/linux/generic/config-3.18
index 68fad28..a5cc156 100644
--- a/target/linux/generic/config-3.18
+++ b/target/linux/generic/config-3.18
@@ -3597,7 +3597,10 @@ CONFIG_SND_DRIVERS=y
 # CONFIG_SND_GUSCLASSIC is not set
 # CONFIG_SND_GUSEXTREME is not set
 # CONFIG_SND_GUSMAX is not set
+# CONFIG_SND_HDA_INPUT_JACK is not set
 # CONFIG_SND_HDA_INTEL is not set
+CONFIG_SND_HDA_POWER_SAVE_DEFAULT=0
+CONFIG_SND_HDA_PREALLOC_SIZE=64
 # CONFIG_SND_HDSP is not set
 # CONFIG_SND_HDSPM is not set
 # CONFIG_SND_HRTIMER is not set