pcuif_proto: rename PCU_IF_FLAG_SYSMO to PCU_IF_FLAG_DIRECT_PHY

The PCUIF flag PCU_IF_FLAG_SYSMO was originally used by osmo-bts-sysmo
to signal to the PCU that the direct PHY access for the sysmo-bts DSP
should be enabled. With time, support for other BTS models was added and
the flag became a synonym for "direct PHY access", so it makes sense to
rename it to "PCU_IF_FLAG_DIRECT_PHY"

Related: OS#6191
Change-Id: I29b7b78a3a91d062b9ea3cd72623d30618cd3f0b
diff --git a/include/osmocom/pcu/pcuif_proto.h b/include/osmocom/pcu/pcuif_proto.h
index cd2a298..9df85d9 100644
--- a/include/osmocom/pcu/pcuif_proto.h
+++ b/include/osmocom/pcu/pcuif_proto.h
@@ -46,7 +46,7 @@
 
 /* flags */
 #define PCU_IF_FLAG_ACTIVE	(1 << 0)/* BTS is active */
-#define PCU_IF_FLAG_SYSMO	(1 << 1)/* access PDCH of sysmoBTS directly */
+#define PCU_IF_FLAG_DIRECT_PHY	(1 << 1)/* access PHY directly via dedicated hardware support */
 #define PCU_IF_FLAG_CS1		(1 << 16)
 #define PCU_IF_FLAG_CS2		(1 << 17)
 #define PCU_IF_FLAG_CS3		(1 << 18)
diff --git a/src/pcu_l1_if.cpp b/src/pcu_l1_if.cpp
index 4af6953..4fcec31 100644
--- a/src/pcu_l1_if.cpp
+++ b/src/pcu_l1_if.cpp
@@ -941,7 +941,7 @@
 
 	for (trx_nr = 0; trx_nr < ARRAY_SIZE(bts->trx); trx_nr++) {
 		bts->trx[trx_nr].arfcn = info_ind->trx[trx_nr].arfcn;
-		if ((info_ind->flags & PCU_IF_FLAG_SYSMO)
+		if ((info_ind->flags & PCU_IF_FLAG_DIRECT_PHY)
 		 && info_ind->trx[trx_nr].hlayer1) {
 #ifdef ENABLE_DIRECT_PHY
 			LOGP(DL1IF, LOGL_DEBUG, " TRX %d hlayer1=%x\n", trx_nr,
@@ -972,7 +972,7 @@
 				if (!pdch->is_enabled()) {
 #ifdef ENABLE_DIRECT_PHY
 					if ((info_ind->flags &
-							PCU_IF_FLAG_SYSMO))
+							PCU_IF_FLAG_DIRECT_PHY))
 						l1if_connect_pdch(
 							bts->trx[trx_nr].fl1h, ts_nr);
 #endif
@@ -1003,7 +1003,7 @@
 			} else {
 				if (pdch->is_enabled()) {
 #ifdef ENABLE_DIRECT_PHY
-					if ((info_ind->flags & PCU_IF_FLAG_SYSMO))
+					if ((info_ind->flags & PCU_IF_FLAG_DIRECT_PHY))
 						l1if_disconnect_pdch(bts->trx[trx_nr].fl1h, ts_nr);
 #endif
 					pcu_tx_act_req(bts, pdch, 0);