When executing "make -C tools/tracing/rtla" on LoongArch, there exists
the following error:

  src/utils.c:237:24: error: '__NR_sched_setattr' undeclared

Just define __NR_sched_setattr for LoongArch if not exist.

Reported-by: Haiyong Sun <sunhaiyong@loongson.cn>
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
---
 tools/tracing/rtla/src/utils.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/tracing/rtla/src/utils.c b/tools/tracing/rtla/src/utils.c
index 4995d35cf3ec..d6ab15dcb490 100644
--- a/tools/tracing/rtla/src/utils.c
+++ b/tools/tracing/rtla/src/utils.c
@@ -227,6 +227,8 @@ long parse_ns_duration(char *val)
 #  define __NR_sched_setattr	355
 # elif __s390x__
 #  define __NR_sched_setattr	345
+# elif __loongarch__
+#  define __NR_sched_setattr	274
 # endif
 #endif
 
-- 
2.42.0