Add config.riscv64 for both BPF CI and local vmtest.
Tested-by: Eduard Zingerman <eddyz87@gmail.com>
Signed-off-by: Pu Lehui <pulehui@huawei.com>
Link: https://lore.kernel.org/r/20240905081401.1894789-8-pulehui@huaweicloud.comSigned-off-by: Alexei Starovoitov <ast@kernel.org>