Fixed CMSIS-RTOS RTX build error.

Some files of CMSIS-RTOS RTX for CA9 has an effect on build error.
Confirmed those are unwanted files. Deleted.
Add SD function

Add SD function and tests for RZ_A1H.
Merge pull request #744 from masaohamanaka/master

Targets: RZ_A1H - Fix RTOS build error (Cortex A)