lib/tools: switch nvflash to tegrarcm
lib/tools: switch nvflash to tegrarcm

We are dropping nvflash in favor of Tegra RCM. Update tools.py

BUG=None
TEST=no longer refers to nvflash

Change-Id: I1b69ad6c1c95f48a8196269d35a4a88acbf14c87
Signed-off-by: Rhyland Klein <9c6f026f68ffecc44f215af186ef513cd72b6ce4@nvidia.com>
Reviewed-on: https://gerrit.chromium.org/gerrit/27803
Reviewed-by: Allen Martin <26c037b3f0ea082472e5dda5744e35dcf1dcb620@nvidia.com>
Reviewed-by: Simon Glass <c00b0378376498bd9cd974c388df8854c0131d27@chromium.org>

coreos/dev-util,marineam/coreos-dev-util,mgireesh05/dev-util,marineam/coreos-dev-util,mgireesh05/dev-util,coreos/dev-util,coreos/dev-util,mgireesh05/dev-util