CMake: Restore rtos api and netsocket presence macro names

The old tools rely on the old names to build

cmsis/device/rtos/CMakeLists.txt

@@ -29,3 +29,8 @@ target_sources(mbed-os PRIVATE
     source/mbed_rtx_handlers.c
     source/mbed_rtx_idle.cpp
 )
+
+target_compile_definitions(mbed-os
+    PUBLIC
+        MBED_CONF_RTOS_PRESENT=1
+)

connectivity/netsocket/CMakeLists.txt

@@ -42,7 +42,7 @@ target_sources(mbed-os-netsocket
 
 target_compile_definitions(mbed-os-netsocket
     INTERFACE
-        MBED_CONF_NETSOCKET_PRESENT=1
+        MBED_CONF_NSAPI_PRESENT=1
 )
 
 target_link_libraries(mbed-os-netsocket

mbed.h

@@ -19,20 +19,20 @@
 
 #include "platform/mbed_version.h"
 
-#if defined(MBED_CONF_RTOS_PRESENT)
+#if MBED_CONF_RTOS_API_PRESENT
 #include "rtos/rtos.h"
 #endif
 
-#if defined(MBED_CONF_NETSOCKET_PRESENT)
+#if MBED_CONF_NSAPI_PRESENT
 #include "netsocket/nsapi.h"
 #include "netsocket/nsapi_ppp.h"
 #endif
 
-#if defined(MBED_CONF_EVENTS_PRESENT)
+#if MBED_CONF_EVENTS_PRESENT
 #include "events/mbed_events.h"
 #endif
 
-#if defined(MBED_CONF_FILESYSTEM_PRESENT)
+#if MBED_CONF_FILESYSTEM_PRESENT
 #include "filesystem/mbed_filesystem.h"
 #endif
 

rtos/CMakeLists.txt

@@ -23,5 +23,5 @@ target_sources(mbed-os
 
 target_compile_definitions(mbed-os
     PUBLIC
-        MBED_CONF_RTOS_PRESENT=1
+        MBED_CONF_RTOS_API_PRESENT=1
 )