[][openwrt][common][Fix aes ccm mode encrypt bug]

[Description]
Fix aes ccm mode encrypt bug.
If the payload in NULL in aes encryption ccm mode, it must
use "" as parameter in `EVP_EncryptUpdate`

[Release-log]

Change-Id: I05c162e76d2390a6d7ae8ae2e36580a72810f034
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/8288138
1 file changed