Revert "serial-uartlite: Use allocated structure instead of static ones"

Revert "serial-uartlite: Use allocated structure instead of static ones"

This reverts commit a00d9db8952b44f4d165e5200fff03c80a84947f.

As Johan says, this driver needs a lot more work and these changes are
only going in the wrong direction:
	https://lkml.kernel.org/r/20190523091839.GC568@localhost

Reported-by: Johan Hovold <johan@kernel.org>
Cc: Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com>
Cc: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>