tisdk-image: use more generic TARGET_SYS, as Linaro has empty TARGET_VENDOR
tisdk-image: use more generic TARGET_SYS, as Linaro has empty TARGET_VENDOR

Signed-off-by: Denys Dmytriyenko <d29de71aea38aad3a87d486929cb0aad173ae612@ti.com>

rcn-ee/meta-arago,MentorEmbedded/meta-arago,rcn-ee/meta-arago,MentorEmbedded/meta-arago,MentorEmbedded/meta-arago,MentorEmbedded/meta-arago,rcn-ee/meta-arago,rcn-ee/meta-arago,rcn-ee/meta-arago