Azure: Rework SH / Renesas job

Now that there is a single SuperH platform, rework the Azure job
slightly.  Azure build time limits mean that we need to split the world
build up still.  Make a single build job for the single Renesas SuperH
platform as well as all of the ARM platforms from Renesas.

Cc: Marek Vasut <marek.vasut+renesas@gmail.com>
Signed-off-by: Tom Rini <trini@konsulko.com>