mb/google/kahlee: Select BT I2S PAD on ACP_BT_UART mux

bt-pad-enable property is used by kernel driver to set
BT I2S PAD on ACP_BT_UART_PAD_SEL mux, for those platforms which
use these pins for BT I2S. By default the pins are set for UART.

BUG=b:72360151
TEST=Tested playback and capture on audio device connected to BT I2S

Change-Id: Id76bfa1fa1dde904f02a03b0c15986ecb1bbcc97
Signed-off-by: Akshu Agrawal <akshu.agrawal@amd.com>
Reviewed-on: https://review.coreboot.org/25653
Reviewed-by: Daniel Kurtz <djkurtz@google.com>
Reviewed-by: Martin Roth <martinroth@google.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/google/kahlee/variants/baseboard/include/baseboard/acpi/audio.asl

@@ -21,6 +21,16 @@ Device (I2S)
 	Name (_HID, "AMD7219")
 	Name (_CID, "AMD7219")
 
+	/* Device-Specific Data */
+	Name (_DSD, Package ()
+	{
+		ToUUID ("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
+		Package ()
+		{
+			Package () { "bt-pad-enable", 1 },
+		}
+	})
+
 	Method (_CRS, 0x0, NotSerialized) {
 		Name (RBUF, ResourceTemplate () {
 			// Memory resource is for MISC FCH register set.