hal: New mixer xml for wcd938x on holi

Introduce new mixer paths xml for wcd938x
with AATC variant on holi.

Change-Id: If7571ba8131627c9367b0be45b23340994ce3fa5
diff --git a/hal/msm8974/platform.c b/hal/msm8974/platform.c
index 21859cb..93a83cc 100644
--- a/hal/msm8974/platform.c
+++ b/hal/msm8974/platform.c
@@ -1803,6 +1803,8 @@
                    sizeof("bengal-qrd-snd-card")) ||
          !strncmp(snd_card_name, "holi-mtp-snd-card",
                    sizeof("holi-mtp-snd-card")) ||
+         !strncmp(snd_card_name, "holi-usbc-snd-card",
+                   sizeof("holi-usbc-snd-card")) ||
          !strncmp(snd_card_name, "holi-mtpsku1-snd-card",
                    sizeof("holi-mtpsku1-snd-card")) ||
          !strncmp(snd_card_name, "holi-qrd-snd-card",