misc: genwqe: Constify struct pci_error_handlers

genwqe_err_handler is never modified, so it can be made const to allow
the compiler to put it in read-only memory.

Before:
   text    data     bss     dec     hex filename
  20174    6104    2464   28742    7046 drivers/misc/genwqe/card_base.o

After:
   text    data     bss     dec     hex filename
  20270    6008    2464   28742    7046 drivers/misc/genwqe/card_base.o
Signed-off-by: Rikard Falkeborn <rikard.falkeborn@gmail.com>
Link: https://lore.kernel.org/r/20200610224704.27082-3-rikard.falkeborn@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/misc/genwqe/card_base.c

@@ -1324,7 +1324,7 @@ static int genwqe_sriov_configure(struct pci_dev *dev, int numvfs)
 	return 0;
 }
 
-static struct pci_error_handlers genwqe_err_handler = {
+static const struct pci_error_handlers genwqe_err_handler = {
 	.error_detected = genwqe_err_error_detected,
 	.mmio_enabled	= genwqe_err_result_none,
 	.slot_reset	= genwqe_err_slot_reset,