serial: 8250_pericom: Revert "Re-enable higher baud rates"

UPF_MAGIC_MULTIPLIER is userspace available bit and can be changed
at any time. There is no sense to rely on it to be always present.

This reverts commit b4ccaf5a

.

Note, that code was not reliably worked before, hence it implies
no functional change.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Fixes: b4ccaf5a ("serial: 8250_pericom: Re-enable higher baud rates")
Link: https://lore.kernel.org/r/20220203150026.19087-1-andriy.shevchenko@linux.intel.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>