qcacmn: HAL layer changes for Moselle

Add the HAL layer APIs for supporting Moselle

CRs-Fixed: 2597328
Change-Id: Idc59af4ee093e702da95aa704fd3abd76ae5834f

hal/wifi3.0/hal_internal.h

@@ -515,6 +515,7 @@ struct hal_soc {
 	bool init_phase;
 };
 
+void hal_qca6750_attach(struct hal_soc *hal_soc);
 void hal_qca6490_attach(struct hal_soc *hal_soc);
 void hal_qca6390_attach(struct hal_soc *hal_soc);
 void hal_qca6290_attach(struct hal_soc *hal_soc);