qcacmn: Set default REO destination ring to SW4

For MDM platforms, set default REO destination
ring to SW4 for STA vdev, which is same as SAP vdev.

Note that RX hashing is still enabled for STA vdev.
Also REO destination are run-time remapped when IPA
automony is enabled and disabled.

Change-Id: I49fa523673e7b736008679adec55821e198e8417
CRs-Fixed: 2456786

dp/wifi3.0/dp_ipa.h

@@ -111,6 +111,8 @@ QDF_STATUS dp_ipa_handle_rx_buf_smmu_mapping(struct dp_soc *soc,
 
 bool dp_reo_remap_config(struct dp_soc *soc, uint32_t *remap1,
 			 uint32_t *remap2);
+bool dp_ipa_is_mdm_platform(void);
+
 #else
 static inline int dp_ipa_uc_detach(struct dp_soc *soc, struct dp_pdev *pdev)
 {