rust: pci: normalise spelling of PCI BAR

Consistently refer to PCI base address register as PCI BAR.
Fix spelling mistake "Mapps" -> "Maps".

Link: https://lore.kernel.org/rust-for-linux/20251015225827.GA960157@bhelgaas/
Link: https://github.com/Rust-for-Linux/linux/issues/1196
Suggested-by: Bjorn Helgaas <[e-mail]>
Signed-off-by: Peter Colberg <[e-mail]>
Signed-off-by: Danilo Krummrich <[e-mail]>

rust/kernel/pci.rs

···
         unsafe { (*self.as_raw()).subsystem_device }
     }
 
-    /// Returns the start of the given PCI bar resource.
+    /// Returns the start of the given PCI BAR resource.
     pub fn resource_start(&self, bar: u32) -> Result<bindings::resource_size_t> {
         if !Bar::index_is_valid(bar) {
             return Err(EINVAL);
···
         Ok(unsafe { bindings::pci_resource_start(self.as_raw(), bar.try_into()?) })
     }
 
-    /// Returns the size of the given PCI bar resource.
+    /// Returns the size of the given PCI BAR resource.
     pub fn resource_len(&self, bar: u32) -> Result<bindings::resource_size_t> {
         if !Bar::index_is_valid(bar) {
             return Err(EINVAL);

rust/kernel/pci/io.rs

···
 /// # Invariants
 ///
 /// `Bar` always holds an `IoRaw` inststance that holds a valid pointer to the start of the I/O
-/// memory mapped PCI bar and its size.
+/// memory mapped PCI BAR and its size.
 pub struct Bar<const SIZE: usize = 0> {
     pdev: ARef<Device>,
     io: IoRaw<SIZE>,
···
 
     /// # Safety
     ///
-    /// `ioptr` must be a valid pointer to the memory mapped PCI bar number `num`.
+    /// `ioptr` must be a valid pointer to the memory mapped PCI BAR number `num`.
     unsafe fn do_release(pdev: &Device, ioptr: usize, num: i32) {
         // SAFETY:
         // `pdev` is valid by the invariants of `Device`.
···
 }
 
 impl Device<device::Bound> {
-    /// Mapps an entire PCI-BAR after performing a region-request on it. I/O operation bound checks
+    /// Maps an entire PCI BAR after performing a region-request on it. I/O operation bound checks
     /// can be performed on compile time for offsets (plus the requested type size) < SIZE.
     pub fn iomap_region_sized<'a, const SIZE: usize>(
         &'a self,
···
         Devres::new(self.as_ref(), Bar::<SIZE>::new(self, bar, name))
     }
 
-    /// Mapps an entire PCI-BAR after performing a region-request on it.
+    /// Maps an entire PCI BAR after performing a region-request on it.
     pub fn iomap_region<'a>(
         &'a self,
         bar: u32,