qcdm: add CM subsystem digital only mode preference

Found on the Huawei EC121.

libqcdm/src/commands.h

@@ -242,6 +242,7 @@ enum {
     /* Note: not the same values as QCDM_CMD_NV_MODE_PREF_ITEM_MODE_PREF has;
      * AUTO really is 0x02 here, not 0x04 like the NV item value for AUTO.
      */
+    QCDM_CMD_CM_SUBSYS_STATE_INFO_MODE_PREF_DIGITAL_ONLY = 0x01,
     QCDM_CMD_CM_SUBSYS_STATE_INFO_MODE_PREF_AUTO = 0x02,
     QCDM_CMD_CM_SUBSYS_STATE_INFO_MODE_PREF_1X_ONLY = 0x09,
     QCDM_CMD_CM_SUBSYS_STATE_INFO_MODE_PREF_HDR_ONLY = 0x0A,

libqcdm/tests/test-qcdm-com.c

@@ -729,6 +729,9 @@ test_com_cm_subsys_state_info (void *f, void *data)
     n32 = 0;
     qcdm_result_get_uint32 (result, QCDM_CMD_CM_SUBSYS_STATE_INFO_ITEM_MODE_PREF, &n32);
     switch (n32) {
+    case QCDM_CMD_CM_SUBSYS_STATE_INFO_MODE_PREF_DIGITAL_ONLY:
+        detail = "digital only";
+        break;
     case QCDM_CMD_CM_SUBSYS_STATE_INFO_MODE_PREF_AUTO:
         detail = "automatic";
         break;