configurations: system1: Add chassis for fans

Add system1 chassis file which includes fans, ambient and psu
temperature sensors.
Correct filename in CONFIG_FORMAT.md file

Change-Id: Ifd3cb5eb2dbe4c62e43bced545c6493652cb730e
Signed-off-by: Chris Cain <cjcain@us.ibm.com>
diff --git a/meson.build b/meson.build
index dbfc82b..c0f649f 100644
--- a/meson.build
+++ b/meson.build
@@ -150,6 +150,7 @@
     'sbp1_psu.json',
     'sbp1_rssd.json',
     'system1_baseboard.json',
+    'system1_chassis.json',
     'solum_pssf162202_psu.json',
     'storm_king.json',
     'stp_baseboard.json',