qcacmn: Properly set RPS for WLAN IPA

It is observed on sdxpinn target (first multi-core MDM platform)
that WLAN failed to enable IPA pipes with SAP-SAP mode when first
ref-client connects to the SAP. Indeed with QCA_CONFIG_RPS=y and
qdf_ipa_get_lan_rx_napi()=true, wlan_ipa_uc_handle_first_con()
directly returns false if more than 1 SAP is started.

This obviously breaks IPA data path for MDM platform, where even
4 SAP can be supported with IPA offload. And WLAN data path
forwarding replies fully on IPA hardware. This also means there's
no need to configure RPS for MDM, which is a host kernel networking
feature.

Change-Id: I4c17f61b1b242cdbaed7177201b330d10ec7e61b
CRs-Fixed: 3490817

ipa/dispatcher/inc/wlan_ipa_ucfg_api.h

@@ -207,7 +207,7 @@ void ucfg_ipa_reg_send_to_nw_cb(struct wlan_objmgr_pdev *pdev,
  *
  * Return: None
  */
-#ifdef QCA_CONFIG_RPS
+#if defined(QCA_CONFIG_RPS) && !defined(MDM_PLATFORM)
 void ucfg_ipa_reg_rps_enable_cb(struct wlan_objmgr_pdev *pdev,
 				wlan_ipa_rps_enable cb);
 #else