qcacmn: Avoid read access to IPA TX doorbell address

Below signature is seen on sdxpinn when HOST reads IPA TX
doorbell address, which leads to HLOS crash.

Internal error: synchronous external abort: 96000010

Indeed IPA TX doorbell address is write-only. Behaviors
on such read access violation is arch-dependent. On
certains platforms, such violation is ignored but read
returns 0.

Hence remove the read access to IPA TX doorbell address
in hal_srng_dst_init_hp() to avoid arch-dependent
behavior.

Change-Id: I3486cd81741922e697e2b3d307db3209b710aa6a
CRs-Fixed: 3339302

hal/wifi3.0/hal_srng.c

@@ -1407,10 +1407,9 @@ void hal_srng_dst_init_hp(struct hal_soc_handle *hal_soc,
 	if (vaddr) {
 		*srng->u.dst_ring.hp_addr = srng->u.dst_ring.cached_hp;
 		QDF_TRACE(QDF_MODULE_ID_DP, QDF_TRACE_LEVEL_ERROR,
-			  "hp_addr=%pK, cached_hp=%d, hp=%d",
+			  "hp_addr=%pK, cached_hp=%d",
 			  (void *)srng->u.dst_ring.hp_addr,
-			  srng->u.dst_ring.cached_hp,
-			  *srng->u.dst_ring.hp_addr);
+			  srng->u.dst_ring.cached_hp);
 	}
 }