libsp: Unit testing sp_memory_management.c

Testing the functions of sp_memory_management.c using the mocked FF-A
layer and SP RXTX implementation. The static functions of the file are
tested by exporting them through c-picker.

Signed-off-by: Imre Kis <imre.kis@arm.com>
Change-Id: Ie9995c83b7d9ceb98527bac6685e6f9d555471af
4 files changed