btrfs: kill btrfs_inode_*time helpers

They just opencode taking address of the timespec member.

Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <clm@fb.com>

diff --cc fs/btrfs/ctree.h
Simple merge

diff --cc fs/btrfs/delayed-inode.c
Simple merge

diff --cc fs/btrfs/inode.c
Simple merge

diff --cc fs/btrfs/send.c
Simple merge

diff --cc fs/btrfs/tree-log.c
Simple merge