kernel: add missing symbols for Linux 4.1

Add some missing symbols to the generic 4.1 kernel config which got triggered
by the introduction of the hda-intel sound module.

Signed-off-by: Jo-Philipp Wich <jo@mein.io>

target/linux/generic/config-4.1

@@ -3732,7 +3732,10 @@ 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