serial: suncore: Fix RSC/LOM handling in sunserial_console_termios().

serial: suncore: Fix RSC/LOM handling in sunserial_console_termios().

[ Upstream commit 457931de3b0925dc2eb941bc7d611a509be36dff ]

RSC and LOM devices have fixed speed settings.

We already had some code to match and handle "rsc" named devices on
E250 systems, but we also have to handle 'rsc-console', 'rsc-control',
and 'lom-console'.

Also, in order to get this right regardless of what 'output-device'
happens to be, explicitly pass the UART device node pointer to this
routine.

Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>