meta-bletchley: motor-ctrl: Change sled numbering to 1-based

switch sled to 1-based numbering to align with multi host systems
tools only accept input sled1 to sled6

Change-Id: Ic372e011716d8de7edf2eebdf8667e44b2179e64
Signed-off-by: Allen.Wang <Allen_Wang@quantatw.com>
diff --git a/meta-facebook/meta-bletchley/conf/machine/bletchley.conf b/meta-facebook/meta-bletchley/conf/machine/bletchley.conf
index 6b7711a..c7407e8 100644
--- a/meta-facebook/meta-bletchley/conf/machine/bletchley.conf
+++ b/meta-facebook/meta-bletchley/conf/machine/bletchley.conf
@@ -14,5 +14,5 @@
 
 PREFERRED_PROVIDER_virtual/phosphor-led-manager-config-native = "bletchley-led-manager-config-native"
 
-OBMC_HOST_INSTANCES = "0 1 2 3 4 5 "
+OBMC_HOST_INSTANCES = "1 2 3 4 5 6"