configurations: Add configurations for mtjefferson

This commit adds Entity-Manager configurations for
Ampere's Mt. Jefferson platform.

Signed-off-by: Hieu Huynh <hieuh@os.amperecomputing.com>
Change-Id: Ia14b42c03442b601abca5eb73b043033e01c3010
diff --git a/meson.build b/meson.build
index b22eb72..f8e44e6 100644
--- a/meson.build
+++ b/meson.build
@@ -156,6 +156,8 @@
     'mtjade.json',
     'mtmitchell_bmc.json',
     'mtmitchell_mb.json',
+    'mtjefferson_bmc.json',
+    'mtjefferson_mb.json',
     'mudflap.json',
     'nf5280m7_baseboard.json',
     'nisqually.json',