SOUND: SAMSUNG: Add I2S driver

This patch adds driver for I2S interface specific to samsung.

Signed-off-by: R. Chandrasekar <rcsekar@samsung.com>
Signed-off-by: Rajeshwari Shinde <rajeshwari.s@samsung.com>
Acked-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
diff --git a/Makefile b/Makefile
index 4fc6a82..8a04727 100644
--- a/Makefile
+++ b/Makefile
@@ -313,6 +313,7 @@
 endif
 LIBS-y += drivers/rtc/librtc.o
 LIBS-y += drivers/serial/libserial.o
+LIBS-y += drivers/sound/libsound.o
 LIBS-$(CONFIG_GENERIC_LPC_TPM) += drivers/tpm/libtpm.o
 LIBS-y += drivers/twserial/libtws.o
 LIBS-y += drivers/usb/eth/libusb_eth.o