udf: propagate umode_t

note re mount options: fmask and dmask are explicitly truncated to 12bit,
UDF_INVALID_MODE just needs to be guaranteed to differ from any such value.
And umask is used only in &= with umode_t, so we ignore other bits anyway.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --cc fs/udf/ialloc.c
Simple merge

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

diff --cc fs/udf/super.c
Simple merge

diff --cc fs/udf/udf_sb.h
Simple merge

diff --cc fs/udf/udfdecl.h
Simple merge