qcacld-3.0: Enable more TX descriptors flag for QCA6750

Enable more TX descriptors flag for QCA6750 target.
This helps to increase TX and completion descriptors size.

Change-Id: I038d5e376aec68741b172d963c9f96925b71d68a
CRs-Fixed: 2769769

configs/default_defconfig

@@ -1119,6 +1119,7 @@ ifeq ($(CONFIG_CNSS_QCA6750), y)
 #Enable 6 GHz Band
 CONFIG_BAND_6GHZ := y
 CONFIG_RX_FISA := y
+CONFIG_MORE_TX_DESC := y
 endif
 
 ifeq ($(CONFIG_CNSS_QCA6490), y)