PCI/doc: cleanup references to the legacy PCI DMA API

Mention the regular DMA API calls instead of the now removed PCI DMA API.

Signed-off-by: Christoph Hellwig <[e-mail]>
Acked-by: Bjorn Helgaas <[e-mail]>

Documentation/PCI/pci.rst

···
 on systems where System RAM exists above 4G _physical_ address.
 
 Drivers for all PCI-X and PCIe compliant devices must call
-pci_set_dma_mask() as they are 64-bit DMA devices.
+set_dma_mask() as they are 64-bit DMA devices.
 
 Similarly, drivers must also "register" this capability if the device
-can directly address "consistent memory" in System RAM above 4G physical
-address by calling pci_set_consistent_dma_mask().
+can directly address "coherent memory" in System RAM above 4G physical
+address by calling dma_set_coherent_mask().
 Again, this includes drivers for all PCI-X and PCIe compliant devices.
 Many 64-bit "PCI" devices (before PCI-X) and some PCI-X devices are
 64-bit DMA capable for payload ("streaming") data but not control
-("consistent") data.
+("coherent") data.
 
 
 Setup shared control data
 -------------------------
-Once the DMA masks are set, the driver can allocate "consistent" (a.k.a. shared)
+Once the DMA masks are set, the driver can allocate "coherent" (a.k.a. shared)
 memory.  See Documentation/core-api/dma-api.rst for a full description of
 the DMA APIs. This section is just a reminder that it needs to be done
 before enabling DMA on the device.
···
   - Disable the device from generating IRQs
   - Release the IRQ (free_irq())
   - Stop all DMA activity
-  - Release DMA buffers (both streaming and consistent)
+  - Release DMA buffers (both streaming and coherent)
   - Unregister from other subsystems (e.g. scsi or netdev)
   - Disable device from responding to MMIO/IO Port addresses
   - Release MMIO/IO Port resource(s)
···
 I.e. unmap data buffers and return buffers to "upstream"
 owners if there is one.
 
-Then clean up "consistent" buffers which contain the control data.
+Then clean up "coherent" buffers which contain the control data.
 
 See Documentation/core-api/dma-api.rst for details on unmapping interfaces.