staging: gpib: Fix PCI header include guard

Clang warns (or errors with CONFIG_WERROR=y):

In file included from drivers/staging/gpib/ines/ines_gpib.c:19:
drivers/staging/gpib/include/gpib_pci_ids.h:3:9: error: '__GPIB_PCI_IDS_H' is used as a header guard here, followed by #define of a different macro [-Werror,-Wheader-guard]
3 | #ifndef __GPIB_PCI_IDS_H
| ^~~~~~~~~~~~~~~~
drivers/staging/gpib/include/gpib_pci_ids.h:4:9: note: '__GPIB_LINUX_PCI_IDS_H' is defined here; did you mean '__GPIB_PCI_IDS_H'?
4 | #define __GPIB_LINUX_PCI_IDS_H
| ^~~~~~~~~~~~~~~~~~~~~~
| __GPIB_PCI_IDS_H

Fix the define to match the guard like the note suggests, as that is
clearly what was intended here.

Fixes: 6c52d5e3cde2 ("staging: gpib: Add common include files for GPIB drivers")
Signed-off-by: Nathan Chancellor <[e-mail]>
Tested-by: Javier Carrasco <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/staging/gpib/include/gpib_pci_ids.h

···
 /* SPDX-License-Identifier: GPL-2.0 */
 
 #ifndef __GPIB_PCI_IDS_H
-#define __GPIB_LINUX_PCI_IDS_H
+#define __GPIB_PCI_IDS_H
 
 #ifndef PCI_VENDOR_ID_AMCC
 #define PCI_VENDOR_ID_AMCC	0x10e8