topology: Update physical link configurations in Broadwell text conf file

To make this conf file a better example, add configurations for the
physical link "Codec", same as that defined by Intel Broadwell upstream
machine driver.

Signed-off-by: Mengdong Lin <mengdong.lin@linux.intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

src/conf/topology/broadwell/broadwell.conf

@@ -389,3 +389,22 @@ SectionGraph."dsp" {
 		"Analog Capture, , SSP0 CODEC IN"
 	]
 }
+
+SectionHWConfig."CodecHWConfig" {
+	id "1"
+	format "I2S"		# physical audio format.
+	bclk   "master"		# Platform is master of bit clock
+	fsync  "master"		# platform is master of fsync
+}
+
+SectionLink."Codec" {
+
+	# used for binding to the physical link
+	id "0"
+
+	hw_configs [
+		"CodecHWConfig"
+	]
+
+	default_hw_conf_id "1"
+}