meta-yosemitev2: add gpio description for debug card

Added gpio description for yosemitev2 platform.

Tested:
Verfied with OCP external debug card display.

Signed-off-by: Manikandan Elumalai <manikandan.hcl.ers.epl@gmail.com>
Change-Id: If72827b8295e27c7d81da5e9f4b412608da9addf
2 files changed