treewide: drivers: espi: Adjust terms per eSPI specification 1.5

1) Replace master/slave in API for new terms in eSPI spec 1.5
2) Reflect eSPI VW change and macro changes across eSPI drivers
3) Update terms in eSPI driver sample and eSPI test driver

Signed-off-by: Jose Alberto Meza <jose.a.meza.arellano@intel.com>