!1087 【OpenHarmony开源贡献者计划2022】fix warning: unused parameter 'curr'

Merge pull request !1087 from 数字猿/master

services/param/liteos/param_osadp.c

@@ -314,6 +314,8 @@ INIT_LOCAL_API uint32_t Difftime(time_t curr, time_t base)
 #ifndef __LITEOS_M__
     return (uint32_t)difftime(curr, base);
 #else
+    (void)curr;
+    (void)base;
     return 0;
 #endif
 }
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