Documentation/sparse: drop __bitwise__

We dropped __CHECK_ENDIAN__ so __bitwise__ is now an implementation
detail. People should use __bitwise everywhere.

Signed-off-by: Michael S. Tsirkin <[e-mail]>

Documentation/dev-tools/sparse.rst

···
 vs cpu-endian vs whatever), and there the constant "0" really _is_
 special.
 
-__bitwise__ - to be used for relatively compact stuff (gfp_t, etc.) that
-is mostly warning-free and is supposed to stay that way.  Warnings will
-be generated without __CHECK_ENDIAN__.
-
-__bitwise - noisy stuff; in particular, __le*/__be* are that.  We really
-don't want to drown in noise unless we'd explicitly asked for it.
-
 Using sparse for lock checking
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