fix(tc0): remove ffa and optee device tree node

As FF-A driver probes OP-TEE SP dynamically, these entries are no more
required.
Signed-off-by: Arunachalam Ganapathy <arunachalam.ganapathy@arm.com>
Change-Id: Ica091722a7fad13e02662b9b2cd11ca1879b9f80

fdts/tc0.dts

@@ -430,16 +430,4 @@
 		};
 	};
 
-	ffa {
-		compatible = "arm,ffa";
-		conduit = "smc";
-		mem_share_buffer = "tx";
-	};
-
-	firmware {
-		optee {
-		      compatible = "linaro,optee-tz";
-		      method = "ffa";
-		};
-	};
 };