spm: provide number of vCPUs and VM size for first SP

The primary VM concept is removed from the SPMC.
Update the SPMC manifests with number of Execution Contexts
and SP workspace size for the first Secure Partition (as it
is done for NWd secondary VMs and other SPs).
Signed-off-by: Olivier Deprez <olivier.deprez@arm.com>
Change-Id: I3b9c52666f7dfe74ab1f7d2148ad0070ee44b54e

plat/arm/board/fvp/fdts/fvp_spmc_manifest.dts

@@ -33,6 +33,8 @@
 			is_ffa_partition;
 			debug_name = "cactus-primary";
 			load_address = <0x7000000>;
+			vcpu_count = <8>;
+			mem_size = <1048576>;
 		};
 		vm2 {
 			is_ffa_partition;

plat/arm/board/fvp/fdts/fvp_spmc_optee_sp_manifest.dts

@@ -34,6 +34,8 @@
 			debug_name = "op-tee";
 			load_address = <0x6280000>;
 			smc_whitelist = <0xbe000000>;
+			vcpu_count = <8>;
+			mem_size = <1048576>;
 		};
 	};