qcacld-3.0: Enable the multiple pages for rx desc pool for auto prjs

Enable the RX_DESC_MULTI_PAGE_ALLOC for qca6390_defconfig to enable the
memory allocation of RX descriptors using multiple pages instead of large
contiguous memory to fix potential memory allocation failure when system
is in the heavy memory fragmentation.

Change-Id: I611850374dce62f8c326b16f95cc162fec32c5e3
CRs-Fixed: 2852534

configs/qca6390_defconfig

@@ -677,6 +677,7 @@ CONFIG_FEATURE_SAR_LIMITS := y
 CONFIG_FEATURE_CONCURRENCY_MATRIX := y
 CONFIG_FEATURE_SAP_COND_CHAN_SWITCH := y
 CONFIG_FEATURE_P2P_LISTEN_OFFLOAD := y
+CONFIG_QCACLD_RX_DESC_MULTI_PAGE_ALLOC := y
 
 #Flags to enable/disable WMI APIs
 CONFIG_WMI_ROAM_SUPPORT := y