This patch removes 'Subtype' byte from SystemCapabilities TLV.
There was an inconsistency in offical IEEE document which was corrected
in 802.1AB-2009/Cor 1-2013.
Signed-off-by: Marcin Chron <marcin_miko1@o2.pl>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>