efi: memmap: fix kernel-doc warnings

Correct all kernel-doc notation to repair warnings that are
reported by scripts/kernel-doc:

memmap.c:38: warning: No description found for return value of '__efi_memmap_init'
memmap.c:82: warning: No description found for return value of 'efi_memmap_init_early'
memmap.c:132: warning: Function parameter or member 'addr' not described in 'efi_memmap_init_late'
memmap.c:132: warning: Excess function parameter 'phys_addr' description in 'efi_memmap_init_late'
memmap.c:132: warning: No description found for return value of 'efi_memmap_init_late'
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Ard Biesheuvel <ardb@kernel.org>
Cc: linux-efi@vger.kernel.org
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>

drivers/firmware/efi/memmap.c

@@ -32,7 +32,7 @@
  * space isn't setup.  Once the kernel is fully booted we can fallback
  * to the more robust memremap*() API.
  *
- * Returns zero on success, a negative error code on failure.
+ * Returns: zero on success, a negative error code on failure.
  */
 int __init __efi_memmap_init(struct efi_memory_map_data *data)
 {
@@ -77,6 +77,8 @@ int __init __efi_memmap_init(struct efi_memory_map_data *data)
  *
  * Use early_memremap() to map the passed in EFI memory map and assign
  * it to efi.memmap.
+ *
+ * Returns: zero on success, a negative error code on failure.
  */
 int __init efi_memmap_init_early(struct efi_memory_map_data *data)
 {
@@ -107,7 +109,7 @@ void __init efi_memmap_unmap(void)
 
 /**
  * efi_memmap_init_late - Map efi.memmap with memremap()
- * @phys_addr: Physical address of the new EFI memory map
+ * @addr: Physical address of the new EFI memory map
  * @size: Size in bytes of the new EFI memory map
  *
  * Setup a mapping of the EFI memory map using ioremap_cache(). This
@@ -126,7 +128,7 @@ void __init efi_memmap_unmap(void)
  * runtime so that things like efi_mem_desc_lookup() and
  * efi_mem_attributes() always work.
  *
- * Returns zero on success, a negative error code on failure.
+ * Returns: zero on success, a negative error code on failure.
  */
 int __init efi_memmap_init_late(phys_addr_t addr, unsigned long size)
 {