[ncp-base] fix the #if check for posix-app (#3735)

src/ncp/ncp_base.cpp

@@ -1744,7 +1744,7 @@ template <> otError NcpBase::HandlePropertyGet<SPINEL_PROP_CAPS>(void)
     SuccessOrExit(error = mEncoder.WriteUintPacked(SPINEL_CAP_MAC_RAW));
 #endif
 
-#if OPENTHREAD_ENABLE_POSIX_APP
+#if OPENTHREAD_PLATFORM_POSIX_APP
     SuccessOrExit(error = mEncoder.WriteUintPacked(SPINEL_CAP_POSIX_APP));
 #endif
 

src/ncp/ncp_base_dispatcher.cpp

@@ -506,7 +506,7 @@ NcpBase::PropertyHandler NcpBase::FindGetPropertyHandler(spinel_prop_key_t aKey)
         handler = &NcpBase::HandlePropertyGet<SPINEL_PROP_CHILD_SUPERVISION_CHECK_TIMEOUT>;
         break;
 #endif
-#if OPENTHREAD_ENABLE_POSIX_APP
+#if OPENTHREAD_PLATFORM_POSIX_APP
     case SPINEL_PROP_RCP_VERSION:
         handler = &NcpBase::HandlePropertyGet<SPINEL_PROP_RCP_VERSION>;
         break;

src/ncp/ncp_base_mtd.cpp

@@ -2961,14 +2961,14 @@ exit:
 
 #endif // OPENTHREAD_ENABLE_MAC_FILTER
 
-#if OPENTHREAD_ENABLE_POSIX_APP
+#if OPENTHREAD_PLATFORM_POSIX_APP
 
 template <> otError NcpBase::HandlePropertyGet<SPINEL_PROP_RCP_VERSION>(void)
 {
     return mEncoder.WriteUtf8(otGetRadioVersionString(mInstance));
 }
 
-#endif // OPENTHREAD_ENABLE_POSIX_APP
+#endif
 
 #if OPENTHREAD_CONFIG_ENABLE_SLAAC