With commit 54efaad ("plugins: adrv9002: constrain RSSI reads") a bug
was introduced for TX ports since we stop checking, in the periodic
update function, the ensm value in case the port is in pin mode.
Therefore the widget was never being updated even if the RF state
changed.

Signed-off-by: Nuno Sa <[email protected]>

If some port is in any other state than rf_enabled when the plugin
initialized or a new profile is loaded, we still try to read the RSSI
level which will fail. Hence, just skip that read if not in the proper
state.

Signed-off-by: Nuno Sa <[email protected]>

Change the argument 'ensm' to 'attr_name' as 'ensm' is specific to
plugins like adrv9002. Hence use a generic name.

Signed-off-by: Nuno Sa <[email protected]>

Check, at the plugin initialization, if the port enable mode is set to
pin. If it is, change the ensm widget sensitivity in the same way we do
it in save_port_en().

Signed-off-by: Nuno Sa <[email protected]>

There's now the possibility of still controlling the port RF enable
state mode even if the port mode is set to pin. That's possible in case
the driver is in control of the pin controlling the port. Hence, let's
check if the driver supports that at the plugin initialization and act
accordingly. To check it we do the following:

 1) Move the port to pin mode if in spi mod;.
 2) Change the RF state mode to rf_enabled;
 3) If success, then we allow changing the RF state even in pin mode;

Signed-off-by: Nuno Sa <[email protected]>