asoc: add support for 7255 monaco

1. Add config for 7255 monaco.
2. Add kernel build rule for 7255 monaco dlkms.

Change-Id: I0b697856907d6bbc7e78a421cde75d6cdf4ee2b4
Signed-off-by: Jiazai Wu <quic_jiazwu@quicinc.com>

soc/Kbuild

@@ -24,6 +24,11 @@ ifeq ($(CONFIG_SND_SOC_AUTO), y)
 		export
 		INCS    +=  -include $(AUDIO_ROOT)/config/sa6155autoconf.h
 	endif
+	ifdef CONFIG_SND_SOC_SA7255
+		include $(AUDIO_ROOT)/config/sa7255auto.conf
+		export
+		INCS    +=  -include $(AUDIO_ROOT)/config/sa7255autoconf.h
+	endif
 else
 ifeq ($(KERNEL_BUILD), 0)
 	ifeq ($(CONFIG_ARCH_SM8150), y)