Add minimal support for ipmitool

Adding just a couple of ipmi commands that ipmitool always calls.
I'm doing this because in order to run the ipmitool lan 1 <parms>
instead of just the raw command the get channel info was needed.
diff --git a/ipmid-api.h b/ipmid-api.h
index 4f00798..e635528 100644
--- a/ipmid-api.h
+++ b/ipmid-api.h
@@ -91,6 +91,7 @@
     IPMI_CC_OK = 0x00,
     IPMI_DCMI_CC_NO_ACTIVE_POWER_LIMIT = 0x80,
     IPMI_CC_INVALID = 0xC1,
+    IPMI_CC_PARM_OUT_OF_RANGE = 0xC9,
     IPMI_CC_SENSOR_INVALID = 0xCB,
     IPMI_CC_RESPONSE_ERROR = 0xCE,
     IPMI_CC_UNSPECIFIED_ERROR = 0xFF,