swapping01.c: use .needs_abi_bits = 64

As this test is not designed for 32-bit systems, so this follow
commit 6b7cccc ("swapping01: Use .skip_in_compat = 1")

.skip_in_compat misses native 32-bit; .needs_abi_bits = 64 covers both.

Signed-off-by: Avinesh Kumar <avinesh.kumar@suse.com>
Reviewed-by: Andrea Cervesato <andrea.cervesato@suse.com>
Reviewed-by: Li Wang <li.wang@linux.dev>

Author: Avinesh Kumar via ltp

testcases/kernel/mem/swapping/swapping01.c

@@ -174,7 +174,7 @@ static struct tst_test test = {
 	.min_mem_avail = 10,
 	.runtime = 600,
 	.test_all = test_swapping,
-	.skip_in_compat = 1,
+	.needs_abi_bits = 64,
 	.needs_kconfigs = (const char *[]) {
 		"CONFIG_SWAP=y",
 		NULL