Remove own_id global variable from SP deployments

Move own_id to local namespace as both ffarpc_call_ep and ffarpc_caller
dependency on global own_id has been resolved.

Signed-off-by: Imre Kis <imre.kis@arm.com>
Change-Id: I86b68a4a05285763218a9e60d6e4d4877b322707
diff --git a/deployments/smm-gateway/common/smm_gateway_sp.c b/deployments/smm-gateway/common/smm_gateway_sp.c
index 3062877..9f930b4 100644
--- a/deployments/smm-gateway/common/smm_gateway_sp.c
+++ b/deployments/smm-gateway/common/smm_gateway_sp.c
@@ -20,8 +20,6 @@
 
 #define CONFIG_NAME_MM_COMM_BUFFER_REGION	"mm-comm-buffer"
 
-uint16_t own_id = 0; /* !!Needs refactoring as parameter to ffarpc_caller_init */
-
 static int sp_init(uint16_t *own_sp_id);
 
 void __noreturn sp_main(struct ffa_init_info *init_info)
@@ -33,6 +31,7 @@
 	struct mm_communicate_ep mm_communicate_call_ep = { 0 };
 	struct ffa_direct_msg req_msg = { 0 };
 	struct ffa_direct_msg resp_msg = { 0 };
+	uint16_t own_id = 0;
 
 	static const EFI_GUID smm_variable_guid = SMM_VARIABLE_GUID;