btrfs: make btrfs_page_mkwrite() to be subpage compatible

Only set_page_dirty() and SetPageUptodate() is not subpage compatible.
Convert them to subpage helpers, so that __extent_writepage_io() can
submit page content correctly.

Tested-by: Ritesh Harjani <riteshh@linux.ibm.com> # [ppc64]
Tested-by: Anand Jain <anand.jain@oracle.com> # [aarch64]
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/inode.c

@@ -8651,8 +8651,8 @@ vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf)
 		flush_dcache_page(page);
 	}
 	ClearPageChecked(page);
-	set_page_dirty(page);
-	SetPageUptodate(page);
+	btrfs_page_set_dirty(fs_info, page, page_start, end + 1 - page_start);
+	btrfs_page_set_uptodate(fs_info, page, page_start, end + 1 - page_start);
 
 	btrfs_set_inode_last_sub_trans(BTRFS_I(inode));