PCI: Update the devres documentation regarding to pcim_*()

There were many changes to PCI core in scope of managed resources APIs.
Update documentation to list the current state of affairs.

Signed-off-by: Andy Shevchenko <[e-mail]>
Acked-by: Bjorn Helgaas <[e-mail]>
Signed-off-by: Jonathan Corbet <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

Documentation/driver-api/driver-model/devres.rst

···
   devm_platform_ioremap_resource_byname()
   devm_platform_get_and_ioremap_resource()
   devm_iounmap()
-  pcim_iomap()
-  pcim_iomap_regions()	: do request_region() and iomap() on multiple BARs
-  pcim_iomap_table()	: array of mapped addresses indexed by BAR
-  pcim_iounmap()
+
+  Note: For the PCI devices the specific pcim_*() functions may be used, see below.
 
 IRQ
   devm_free_irq()
···
   devm_pci_alloc_host_bridge()  : managed PCI host bridge allocation
   devm_pci_remap_cfgspace()	: ioremap PCI configuration space
   devm_pci_remap_cfg_resource()	: ioremap PCI configuration space resource
+
   pcim_enable_device()		: after success, all PCI ops become managed
+  pcim_iomap()			: do iomap() on a single BAR
+  pcim_iomap_regions()		: do request_region() and iomap() on multiple BARs
+  pcim_iomap_regions_request_all() : do request_region() on all and iomap() on multiple BARs
+  pcim_iomap_table()		: array of mapped addresses indexed by BAR
+  pcim_iounmap()		: do iounmap() on a single BAR
+  pcim_iounmap_regions()	: do iounmap() and release_region() on multiple BARs
   pcim_pin_device()		: keep PCI device enabled after release
+  pcim_set_mwi()		: enable Memory-Write-Invalidate PCI transaction
 
 PHY
   devm_usb_get_phy()