Add the FLASH IO for the vme300 boards #435

Job	Run time
7.0/ubuntu-20.04/gcc/default/	1m 18s
7.0/ubuntu-20.04/gcc/static/	1m 12s
3.15/ubuntu-20.04/gcc/default/	1m 22s
3.14/ubuntu-20.04/gcc/default/	1m 46s
7.0/ubuntu-20.04/gcc/static/CMD_CXXFLAGS=-std=c++11	1m 15s
7.0/ubuntu-20.04/clang/default/CMD_CXXFLAGS=-std=c++11	1m 16s
7.0/ubuntu-20.04/gcc/default4.10/	1m 51s
7.0/ubuntu-20.04/gcc/default4.9/	1m 52s
7.0/ubuntu-20.04/gcc-8/default/	1m 20s
7.0/ubuntu-20.04/clang/default/	1m 9s
7.0/ubuntu-latest/gcc/default/	1m 29s
	15m 50s

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