We are going to add more items to `opentitan_ip` and instead of
hardcoding each field, add a general mechanism to provide a list
of files. Convert all users.

Signed-off-by: Amaury Pouly <[email protected]>

The ipgen IPs put paramters in ipconfig and those are important
for the DT. Extend `dtgen` to accept a new `--ipconfig` parameter
and pass those files from the HW description.

Signed-off-by: Amaury Pouly <[email protected]>

Signed-off-by: Amaury Pouly <[email protected]>

Enhance `dtgen` to accept a new `--extension` argument to point
to a python plugin. This plugin can be used to customize the DT
in a controlled way by adding some fields and methods. The extension
can be set through the HW desc 'extension' field (per-IP).

Signed-off-by: Amaury Pouly <[email protected]>

Wakeups are important for the `pwrmgr`. Each IP with wakeups now
has a `dt_<ip>_wakeup_t` enumeration.

Signed-off-by: Amaury Pouly <[email protected]>

Signed-off-by: Amaury Pouly <[email protected]>

There are cases where a DT implementation (e.g. `dt_pwrmgr.c`) needs
information from another IPs header (e.g. `dt_pinmux.h`). Makes this
possible by adding all DT headers as dependencies of all DT sources.

Signed-off-by: Amaury Pouly <[email protected]>

Signed-off-by: Amaury Pouly <[email protected]>

Signed-off-by: Amaury Pouly <[email protected]>

This extension adds method to list the wakeup sources.

Signed-off-by: Amaury Pouly <[email protected]>

Currently the DIF context only stores the base address but in the
future it will be useful to remember the DT instance ID. If the DIF
is not initialized through the `init_from_dv` function, the instance
ID is set to `unknown`.

Signed-off-by: Amaury Pouly <[email protected]>

Signed-off-by: Amaury Pouly <[email protected]>

Some definitions are kept in the headers so that pwrmgr tests
keep compiling until they are themselves ported.

Signed-off-by: Amaury Pouly <[email protected]>

When iterating on the top configuration, the code uses a fixed
path under `/tmp/`. This can cause permission problems in multi
user systems. Change the code to keep the file dump in memory,
hence solving the problem.

Signed-off-by: Amaury Pouly <[email protected]>

Signed-off-by: Amaury Pouly <[email protected]>