selftests: bpf: fix backported ASSERT_FALSE

BugLink: https://bugs.launchpad.net/bugs/1949019

Commit 183d9eb ("selftests/bpf: Fix core_reloc test runner") causes
builds of selftests/bpf to fail on 5.10.y since the branch doesn't have the
ASSERT_FALSE macro yet. Replace ASSERT_FALSE with ASSERT_EQ.

Fixes: 183d9eb ("selftests/bpf: Fix core_reloc test runner")
Signed-off-by: Lorenz Bauer <lmb@cloudflare.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Chia-Lin Kao (AceLan) <acelan.kao@canonical.com>

tools/testing/selftests/bpf/prog_tests/core_reloc.c

@@ -857,7 +857,7 @@ void test_core_reloc(void)
 			goto cleanup;
 		}
 
-		if (!ASSERT_FALSE(test_case->fails, "obj_load_should_fail"))
+		if (!ASSERT_EQ(test_case->fails, false, "obj_load_should_fail"))
 			goto cleanup;
 
 		equal = memcmp(data->out, test_case->output,