SDCC: Fix identification of current sdcc compiler

The sdcc compiler no longer defines the `SDCC` preprocessor macro.
Instead `__SDCC_VERSION_MAJOR` and similar component-wise macros are
defined.  Use them instead if defined.

Issue: #16746

Modules/Compiler/SDCC-C-DetermineCompiler.cmake

@@ -1,10 +1,16 @@
 
 # sdcc, the small devices C compiler for embedded systems,
 #   http://sdcc.sourceforge.net  */
-set(_compiler_id_pp_test "defined(SDCC)")
+set(_compiler_id_pp_test "defined(__SDCC_VERSION_MAJOR) || defined(SDCC)")
 
 set(_compiler_id_version_compute "
+# if defined(__SDCC_VERSION_MAJOR)
+#  define COMPILER_VERSION_MAJOR @MACRO_DEC@(__SDCC_VERSION_MAJOR)
+#  define COMPILER_VERSION_MINOR @MACRO_DEC@(__SDCC_VERSION_MINOR)
+#  define COMPILER_VERSION_PATCH @MACRO_DEC@(__SDCC_VERSION_PATCH)
+# else
   /* SDCC = VRP */
 #  define COMPILER_VERSION_MAJOR @MACRO_DEC@(SDCC/100)
 #  define COMPILER_VERSION_MINOR @MACRO_DEC@(SDCC/10 % 10)
-#  define COMPILER_VERSION_PATCH @MACRO_DEC@(SDCC    % 10)")
+#  define COMPILER_VERSION_PATCH @MACRO_DEC@(SDCC    % 10)
+# endif")