defconfig: kona: Enable missing networking options

Android Kernel Net Testing requires additional configuration options
to work properly. Enable the following:
	SYN_COOKIES
	IP_SCTP

CRs-Fixed: 2545244
Change-Id: I8a15ca0695405b3ab8e95512e56407172edba484
Acked-by: Raul Martinez <mraul@qti.qualcomm.com>
Signed-off-by: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>