Corstone-1000: Fix build error when no connection-based services

When there are no connection-based services, the tfm_rpc_connect
and tfm_rpc_close APIs are not needed and not available.

This patch fixes the issue in Corstone-1000 platform code.
The issue is that those two APIs are always called, should be called
depends on the API availability.

Change-Id: Ie5f8c02d63e35c7d55d2ab3dad5fd2fd5e902fe1
Signed-off-by: Kevin Peng <kevin.peng@arm.com>
1 file changed