fix[IAR/RL78 Port] Compilation fails on portasm.s file #2976

Job	Run time
WIN32 MSVC	3m 46s
GNU MSP430 Toolchain	1m 39s
WIN32 MingW	3m 24s
Native GCC (macos-latest)	3m 7s
CMake Example with Native GCC	19s
Native GCC (ubuntu-latest)	1m 38s
GNU ARM Toolchain	2m 22s
GCC MicroBlaze Toolchain	3m 58s
	20m 13s

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