[PATCH] selftests/bpf: Fix the address is NULL

[wuyonggang001]

Fix the following coccicheck error:

tools/testing/selftests/bpf/progs/test_ksyms_weak.c:53:6-20: ERROR: test 
of a variable/field address

Signed-off-by: Yonggang Wu <wuyonggang001@xxxxxxxxxx>
---
 tools/testing/selftests/bpf/progs/test_ksyms_weak.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/bpf/progs/test_ksyms_weak.c 
b/tools/testing/selftests/bpf/progs/test_ksyms_weak.c
index d00268c91e19..768a4d6ee6f5 100644
--- a/tools/testing/selftests/bpf/progs/test_ksyms_weak.c
+++ b/tools/testing/selftests/bpf/progs/test_ksyms_weak.c
@@ -50,7 +50,7 @@ int pass_handler(const void *ctx)
     /* tests non-existent symbols. */
     out__non_existent_typed = (__u64)&bpf_link_fops2;

-    if (&bpf_link_fops2) /* can't happen */
+    if (&bpf_link_fops2 != NULL) /* can't happen */
         out__non_existent_typed = 
(__u64)bpf_per_cpu_ptr(&bpf_link_fops2, 0);

     if (!bpf_ksym_exists(bpf_task_acquire))