serial: 8250_pci: Add WCH384_8S 8 port serial device

Add PCI id for WCH384_8S 8 port PCI-E serial card.
because this card has so many ports, you may have
to check these two options before use it:
  CONFIG_SERIAL_8250_RUNTIME_UARTS
  CONFIG_SERIAL_8250_NR_UARTS

Signed-off-by: Du Huanpeng <u74147@gmail.com>
Link: https://lore.kernel.org/r/1598060848-27807-1-git-send-email-u74147@gmail.com


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