serial: 8250_pci: Drop bogus __refdata annotation

Since commit d73dfc6a41 ("serial: 8250_pci: remove __devexit
usage") in v3.9, the 8250/16550 PCI serial driver no longer has any code
or data located in initmem, hence there is no need to annotate the
pci_serial_quirks structure with __refdata.  Drop the annotation, to
avoid suppressing future section warnings.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20201211133907.2970460-1-geert+renesas@glider.be
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/serial/8250/8250_pci.c

@@ -1964,7 +1964,7 @@ pci_moxa_setup(struct serial_private *priv,
  * This list is ordered alphabetically by vendor then device.
  * Specific entries must come before more generic entries.
  */
-static struct pci_serial_quirk pci_serial_quirks[] __refdata = {
+static struct pci_serial_quirk pci_serial_quirks[] = {
 	/*
 	* ADDI-DATA GmbH communication cards <info@addi-data.com>
 	*/