kill unused invalidate_inode_pages helper

No one is calling this anymore as everyone has switched to
invalidate_mapping_pages long time ago. Also update a few
references to it in comments. nfs has two more, but I can't
easily figure what they are actually referring to, so I left
them as-is.

Signed-off-by: Christoph Hellwig <[e-mail]>
Signed-off-by: Al Viro <[e-mail]>

drivers/usb/gadget/f_mass_storage.c

···
 	unsigned long	rc;
 
 	rc = invalidate_mapping_pages(inode->i_mapping, 0, -1);
-	VLDBG(curlun, "invalidate_inode_pages -> %ld\n", rc);
+	VLDBG(curlun, "invalidate_mapping_pages -> %ld\n", rc);
 }
 
 static int do_verify(struct fsg_common *common)

drivers/usb/gadget/file_storage.c

···
 	unsigned long	rc;
 
 	rc = invalidate_mapping_pages(inode->i_mapping, 0, -1);
-	VLDBG(curlun, "invalidate_inode_pages -> %ld\n", rc);
+	VLDBG(curlun, "invalidate_mapping_pages -> %ld\n", rc);
 }
 
 static int do_verify(struct fsg_dev *fsg)

include/linux/fs.h

···
 unsigned long invalidate_mapping_pages(struct address_space *mapping,
 					pgoff_t start, pgoff_t end);
 
-static inline unsigned long __deprecated
-invalidate_inode_pages(struct address_space *mapping)
-{
-	return invalidate_mapping_pages(mapping, 0, ~0UL);
-}
-
 static inline void invalidate_remote_inode(struct inode *inode)
 {
 	if (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||

mm/filemap.c

···
 			if (!PageUptodate(page)) {
 				if (page->mapping == NULL) {
 					/*
-					 * invalidate_inode_pages got it
+					 * invalidate_mapping_pages got it
 					 */
 					unlock_page(page);
 					page_cache_release(page);