lib: fconf: Implement a parser to populate CoT

Implemented a parser which populates the properties of
the CoT descriptors as per the binding document [1].
'COT_DESC_IN_DTB' build option is disabled by default and can
be enabled in future for all Arm platforms by making necessary
changes in the memory map.
Currently, this parser is tested only for FVP platform.

[1]:
https://trustedfirmware-a.readthedocs.io/en/latest/components/cot-binding.html

Change-Id: I2f911206087a1a2942aa728de151d2ac269d27cc
Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
diff --git a/include/tools_share/tbbr_oid.h b/include/tools_share/tbbr_oid.h
index 37d87d3..c789f79 100644
--- a/include/tools_share/tbbr_oid.h
+++ b/include/tools_share/tbbr_oid.h
@@ -7,6 +7,8 @@
 #ifndef TBBR_OID_H
 #define TBBR_OID_H
 
+#define	MAX_OID_NAME_LEN	30
+
 /*
  * The following is a list of OID values defined and reserved by ARM, which
  * are used to define the extension fields of the certificate structure, as