PXX + PPM16 port from er9x

DSM2 model id for ModelMatch feature

src/Makefile

@@ -103,15 +103,12 @@ LOGS = YES
 # PXX (FrSky PCM) protocol
 PXX = NO
 
+# PPM16
+PPM16 = NO
+
 # DSM2 (Spektrum) protocol
 DSM2 = NO
 
-# Silver protocol
-SILVER = NO
-
-# CTP-1009 protocol
-CTP1009 = NO
-
 # SOMO-14D module
 SOMO = NO
 
@@ -342,28 +339,21 @@ ifeq ($(DISPLAY_USER_DATA), YES)
 endif
 
 ifeq ($(PXX), YES)
-  MODS:=${MODS}X
   CPPDEFS += -DPXX
 endif
 
+ifeq ($(PPM16), YES)
+  CPPDEFS += -DPPM16
+endif
+
 ifeq ($(DSM2), SERIAL)
-  MODS:=${MODS}D
   CPPDEFS += -DDSM2 -DDSM2_SERIAL
 endif
 
 ifeq ($(DSM2), PPM)
-  MODS:=${MODS}D
   CPPDEFS += -DDSM2 -DDSM2_PPM
 endif
 
-ifeq ($(SILVER), YES)
-  CPPDEFS += -DSILVER
-endif
-
-ifeq ($(CTP1009), YES)
-  CPPDEFS += -DCTP1009
-endif
-
 #---------------- Compiler Options C ----------------
 #  -g*:          generate debugging information
 #  -O*:          optimization level