net: mscc: ocelot: expose vsc7514_regmap definition

net: mscc: ocelot: expose vsc7514_regmap definition

The VSC7514 target regmap is identical for ones shared with similar
hardware, specifically the VSC7512. Share this resource, and change the
name to match the pattern of other exported resources.

Signed-off-by: Colin Foster <[email protected]>
Reviewed-by: Florian Fainelli <[email protected]>
Reviewed-by: Vladimir Oltean <[email protected]>
Tested-by: Vladimir Oltean <[email protected]> # regression
Signed-off-by: Jakub Kicinski <[email protected]>