module/scmi_perf: Remove previous implementation of fast channels

This change removes the previous implementation of fast channels and
uses transport layer based implementation. The flag
BUILD_HAS_MOD_TRANSPORT_FC has been removed from scmi perf.

Change-Id: I2980ad951ac796c346f5e2675404fd182bcbaebf
Signed-off-by: Md Golam Tanvir Zim <mdgolamtanvir.zim@arm.com>