qcacmn: Support none 4k page size kernel

DP uses multi page allocation for tx/rx descriptor.
ID and offset mask of decriptor is based on 4096 which
couples with Kernel's MMU PAGE_SIZE. This cause trouble
when deploy driver on none-4K page size kernel.
Set qdf_dp_blockmem_size to 4096 so that DP won't
depend on kernel page size.

Change-Id: I17f5c10b394e8709e6b4b153f3dd094cf792787f
CRs-Fixed: 3235246

dp/wifi3.0/dp_tx_desc.c

@@ -99,6 +99,7 @@ QDF_STATUS dp_tx_desc_pool_alloc(struct dp_soc *soc, uint8_t pool_id,
 
 	desc_size = DP_TX_DESC_SIZE(sizeof(struct dp_tx_desc_s));
 	tx_desc_pool = &((soc)->tx_desc[(pool_id)]);
+	tx_desc_pool->desc_pages.page_size = DP_BLOCKMEM_SIZE;
 	dp_desc_multi_pages_mem_alloc(soc, DP_TX_DESC_TYPE,
 				      &tx_desc_pool->desc_pages,
 				      desc_size, num_elem,