[PATCH] perf build: Add rust target flag for loongarch cross compile

[Li Fangxu]

From: lifangxu <lifangxu@xxxxxxxxxx>

Based on commit 30f998c992c9 ("tools build: Fix rust cross
compilation"), add rust target flags for loongarch cross tool to fix
perf compilation error:
*** Unknown rust cross compilation architecture loongarch. Stop.

Signed-off-by: lifangxu <lifangxu@xxxxxxxxxx>
---
 tools/perf/Makefile.config | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config
index 0ba307e78fe1..42c0ef213750 100644
--- a/tools/perf/Makefile.config
+++ b/tools/perf/Makefile.config
@@ -1149,6 +1149,8 @@ ifndef NO_RUST
     RUST_TARGET_FLAGS_s390	:= s390x-unknown-linux-gnu
     RUST_TARGET_FLAGS_x86	:= x86_64-unknown-linux-gnu
     RUST_TARGET_FLAGS_x86_64	:= x86_64-unknown-linux-gnu
+    RUST_TARGET_FLAGS_loongarch := loongarch64-unknown-linux-gnu
+
 
     ifeq ($(RUST_TARGET_FLAGS_$(ARCH)),)
       $(error Unknown rust cross compilation architecture $(ARCH))
-- 
2.43.0