Treewide: remove address of the Free Software Foundation ...

The FSF address has changed in the past. Instead of updating it
each time the address changes, just drop it completely treewide.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

serial stm: fix unregister ...

- Add missing console_unregister call
- use dev->priv instead of dev->type_data

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

introduce io.h ...

To allow for some generic io accessors introduce io.h and use
this instead of asm/io.h throughout the tree.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

serial stm: get rid of map_base ...

While at it, dynamically allocate private driver struct.
There might be only a single instance of this driver,
but don't be a bad example for others.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

STM378x: Do not configure any pin usage in the driver ...

Only the platform should configure pins to be used by the driver.
The driver must work independently from the settings.

Signed-off-by: Juergen Beisert <jbe@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

STM378x: Use Hz as the clock unit like in all other arch ...

i.MX23 currently uses kHz as the unit for its clock handling and calculation
to avoid overflows when calculation with the internal 480 MHz PLL and its
fractional divider. This patch changes all routines to accept Hz and deliver
Hz as the clock unit.

Signed-off-by: Juergen Beisert <jbe@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Add the driver for the i.MX23 debug UART ...

The i.MX23 comes with a special UART dedicated for debugging purposes. This one
is mostly used for the console the user can reach.

Signed-off-by: Juergen Beisert <jbe@pengutronix.de>