TFTP errors

Created new errors, InternalFailure and
InvalidArgument, in Common.errors.yaml.
These errors are used in TFTP.interface.yaml.

Change-Id: I2aa3e7bf57b2562945efdd9efba19b4551a7c0b1
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
diff --git a/xyz/openbmc_project/Common.errors.yaml b/xyz/openbmc_project/Common.errors.yaml
index 3024682..4dd9311 100644
--- a/xyz/openbmc_project/Common.errors.yaml
+++ b/xyz/openbmc_project/Common.errors.yaml
@@ -1,2 +1,9 @@
 - name: Timeout
-  description: Operation timed out
+  description: >
+    Operation timed out.
+- name: InternalFailure
+  description: >
+    The operation failed internally.
+- name: InvalidArgument
+  description: >
+    Invalid argument was given.