MdePkg: Change IoLibFifo.c to IoLibFifoCc.c

Change IoLibFifo.c to IoLibFifoCc.c since the
file is for Tdx and SEV in BaseIoLibIntrinsicSev.
It's also to distinguish with a new incoming
IoLibFifo.c for BaseIoLibIntrinsic.

Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Liming Gao <gaoliming@byosoft.com.cn>
Cc: Zhiguang Liu <zhiguang.liu@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Signed-off-by: Dun Tan <dun.tan@intel.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>
Acked-by: Michael D Kinney <michael.d.kinney@intel.com>
Acked-by: Laszlo Ersek <lersek@redhat.com>

MdePkg/Library/BaseIoLibIntrinsic/BaseIoLibIntrinsicSev.inf

@@ -45,7 +45,7 @@
   IoLibMsc.c    | MSFT
   IoLib.c
   IoLibInternalTdx.c
-  IoLibFifo.c
+  IoLibFifoCc.c
   X64/IoFifoSev.nasm
 
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