pshared: Add mutex_init_pshared_with_type()

pshared: Add mutex_init_pshared_with_type()

To initialize mutex to be shared across processes, the helper function
mutex_init_pshared() is available. However, it does not allow to set
mutex attribute types such as POSIX_MUTEX_RECURSIVE.

To allow setting mutex attribute types, introduce another helper function
mutex_init_pshared_with_type(). It initialize mutex for sharing across
processes and set attribute types specified as its argument.

Signed-off-by: Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>