David Brownell [david-b@pacbell.net]:

Simplify dumping of register lists by only printing cached values
if they are marked as valid.  Most of the time, they are invalid;
so printing *any* value is just misleading.

Note that for ARM7 and ARM9 most EmbeddedICE registers (except for
debug status) could be cached most of the time; and their register
cache isn't maintained properly (many accesses seem to bypass that
cache code).

git-svn-id: svn://svn.berlios.de/openocd/trunk@2594 b42882b7-edfa-0310-969c-e2dbd0fdcd60