core: static ta: bugfix copy_in_param()

Prior to this patch copy_in_param() for static TA mistook the size of
the mobj as the size of the parameter. This patches fixes that.

Fixes: 0dcfa56 ("core: introduce MOBJ abstraction")
Reviewed-by: Jerome Forissier <jerome.forissier@linaro.org>
Tested-by: Jens Wiklander <jens.wiklander@linaro.org>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>

core/arch/arm/kernel/static_ta.c

@@ -58,7 +58,7 @@ static TEE_Result copy_in_param(struct tee_ta_param *param,
 			if (!va)
 				return TEE_ERROR_BAD_PARAMETERS;
 			tee_param[n].memref.buffer = va;
-			tee_param[n].memref.size = param->u[n].mem.mobj->size;
+			tee_param[n].memref.size = param->u[n].mem.size;
 			break;
 		default:
 			memset(tee_param + n, 0, sizeof(TEE_Param));