meta-ibm: p10bmc: Add otptool configuration

Some addition development details must be managed in this bbappend due
to co-development of the AST2600 and IBM p10bmc designs. IBM did bringup
of secure-boot on pre-production AST2600 silicon and this shaped how the
platform's OTP was configured.

The PEM files represent the public portion of the IBM signing key-pairs
for p10bmc systems. These are included to provide a canonical location
for the production OTP image artifact.

Change-Id: I7caa6cfd5848b1d671ef95f8031b76088673900a
Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
diff --git a/meta-ibm/recipes-bsp/u-boot/u-boot-aspeed-sdk/p10bmc/keys/P10BMCAspeedSBPubKey_3.pem b/meta-ibm/recipes-bsp/u-boot/u-boot-aspeed-sdk/p10bmc/keys/P10BMCAspeedSBPubKey_3.pem
new file mode 100644
index 0000000..062be04
--- /dev/null
+++ b/meta-ibm/recipes-bsp/u-boot/u-boot-aspeed-sdk/p10bmc/keys/P10BMCAspeedSBPubKey_3.pem
@@ -0,0 +1,14 @@
+-----BEGIN PUBLIC KEY-----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+-----END PUBLIC KEY-----