Add support for the generic Telechips firmware format checksums - use -tcc=sum if the header just contains a single checksum, or -tcc=crc if the header contains two 32-bit CRCs.  Credit goes to Hein-Pieter van Braam for his work on identifying the (reverse) CRC32 algorithm used when calculating the two CRCs

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@14917 a1c6a512-1295-4272-9138-f99709370657
diff --git a/docs/CREDITS b/docs/CREDITS
index 8396793..0f09162 100644
--- a/docs/CREDITS
+++ b/docs/CREDITS
@@ -336,6 +336,7 @@
 Pinitnun Shanasabang
 Ken Fazzone
 David Bishop
+Hein-Pieter van Braam
 
 The libmad team
 The wavpack team