8250: Don't clobber spinlocks.

8250: Don't clobber spinlocks.

In serial8250_isa_init_ports(), the port's lock is initialized.  We
should not overwrite it.  In early_serial_setup(), only copy in the
fields we need.  Since the early console code only uses a subset of
the fields, these are sufficient.

Signed-off-by: David Daney <[email protected]>
Signed-off-by: Tomaso Paoletti <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Alan Cox <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>