staging: gpib: Use __iomem attribute for io addresses

staging: gpib: Use __iomem attribute for io addresses

In a number of drivers the PCI memory pointers were declared simply as
void *.
This caused sparse to emit the following warning, for example:

agilent_82350b/agilent_82350b.c:44:58: warning: incorrect type in argument 2 (different address spaces)
agilent_82350b/agilent_82350b.c:44:58:    expected void volatile [noderef] __iomem *addr

Declare the PCI memory pointers as void __iomem *addr.

Signed-off-by: Dave Penkler <dpenkler@gmail.com>
Link: https://lore.kernel.org/r/20250114165403.16410-2-dpenkler@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>