Add mpich support

This patch add mpich support to yocto in order to run MPI framework on embedded
systems.

Signed-off-by: Alejandro Hernandez <alejandro.hernandez@linux.intel.com>
Signed-off-by: Victor Rodriguez <victor.rodriguez.bahena@intel.com>
Signed-off-by: Alexandru.Vaduva <Alexandru.Vaduva@enea.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>