PCI: switchtec: Add missing __iomem and __user tags to fix sparse warnings

PCI: switchtec: Add missing __iomem and __user tags to fix sparse warnings

Fix a number of missing __iomem and __user tags in the ioctl functions of
the switchtec driver. This fixes a number of sparse warnings of the form:

  $ make C=2 drivers/pci/switch/
  drivers/pci/switch/switchtec.c:... incorrect type in ... (different address spaces)

Fixes: ccf4665a7745 ("switchtec: Add IOCTLs to the Switchtec driver")
Link: https://lore.kernel.org/r/20200728192434.18993-1-logang@deltatee.com
Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>