IAR: Add v850 assembler support

Assembler compiler configuration for 'v850' architecture

Issue: #17264

Modules/Compiler/IAR-ASM.cmake

@@ -37,6 +37,11 @@ elseif("${CMAKE_ASM${ASM_DIALECT}_COMPILER_ARCHITECTURE_ID}" STREQUAL "MSP430")
   __compiler_iar_xlink(ASM)
   set(CMAKE_ASM_SOURCE_FILE_EXTENSIONS s43;asm;msa)
 
+elseif("${CMAKE_ASM${ASM_DIALECT}_COMPILER_ARCHITECTURE_ID}" STREQUAL "V850")
+  set(CMAKE_ASM_COMPILE_OBJECT  "<CMAKE_ASM_COMPILER> -S <SOURCE> <DEFINES> <INCLUDES> <FLAGS> -o <OBJECT>")
+  __compiler_iar_xlink(ASM)
+  set(CMAKE_ASM_SOURCE_FILE_EXTENSIONS r85;asm;msa)
+
 else()
   message(FATAL_ERROR "CMAKE_ASM${ASM_DIALECT}_COMPILER_ARCHITECTURE_ID not detected. This should be automatic.")
 endif()