Add the FLASH IO for the vme300 boards #430

Job	Run time
7.0/ubuntu-20.04/gcc/default/	1m 18s
7.0/ubuntu-20.04/gcc/static/	1m 17s
3.15/ubuntu-20.04/gcc/default/	1m 22s
3.14/ubuntu-20.04/gcc/default/	1m 47s
7.0/ubuntu-20.04/gcc/static/CMD_CXXFLAGS=-std=c++11	1m 24s
7.0/ubuntu-20.04/clang/default/CMD_CXXFLAGS=-std=c++11	1m 26s
7.0/ubuntu-20.04/gcc/default4.10/	2m 44s
7.0/ubuntu-20.04/gcc/default4.9/	1m 38s
7.0/ubuntu-20.04/gcc-8/default/	1m 34s
7.0/ubuntu-20.04/clang/default/	1m 28s
7.0/ubuntu-latest/gcc/default/	1m 18s
	17m 16s

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