configurations: Add IBM's Blyth2 panel

This is the same as the Blyth panel but has an HDC1080 instead of an
SI7020.  It has CCIN 6C85.

Signed-off-by: Matt Spinler <spinler@us.ibm.com>
Change-Id: I961dba7fab1a6c60727f249c5de64cdd8fe17e32
diff --git a/configurations/meson.build b/configurations/meson.build
index ab0d86f..8ecbaef 100644
--- a/configurations/meson.build
+++ b/configurations/meson.build
@@ -30,6 +30,7 @@
     'blueridge_2u_chassis.json',
     'blueridge_4u_chassis.json',
     'blyth.json',
+    'blyth2.json',
     'bnp_baseboard.json',
     'bonnell.json',
     'brcm_100g_1p_ocp_mezz.json',