asoc: codec: Add initial driver for swr-haptics

The haptics module in some PMICs has SWR slave data port which connects
to Bolero SWR RX port and it can receive PCM data from that port and use
it as the pattern source to play the vibration. Add the driver to
support it.

Change-Id: I5e6811ac8d81a60c3cd226029ef22ee12ed46f1d
Signed-off-by: Fenglin Wu <fenglinw@codeaurora.org>

asoc/codecs/Kbuild

@@ -187,6 +187,10 @@ ifdef CONFIG_SND_SOC_WCD_IRQ
 	CORE_OBJS += wcd-irq.o
 endif
 
+ifdef CONFIG_SND_SWR_HAPTICS
+	SWR_HAP_OBJS += swr-haptics.o
+endif
+
 LINUX_INC +=	-Iinclude/linux
 
 INCS +=		$(COMMON_INC) \
@@ -271,5 +275,8 @@ obj-$(CONFIG_SND_SOC_MSM_HDMI_CODEC_RX) += hdmi_dlkm.o
 hdmi_dlkm-y := $(HDMICODEC_OBJS)
 endif
 
+obj-$(CONFIG_SND_SWR_HAPTICS) += swr_haptics_dlkm.o
+swr_haptics_dlkm-y := $(SWR_HAP_OBJS)
+
 # inject some build related information
 DEFINES += -DBUILD_TIMESTAMP=\"$(shell date -u +'%Y-%m-%dT%H:%M:%SZ')\"