headers/deps: libata: Optimize <linux/libata.h> dependencies, remove <linux/sched.h> inclusion

          --------------------------------------------------------------------
          | Combined, preprocessed C code size of header, without line markers,
          | with comments stripped:
          -------------------------
  before: | #include <linux/libata.h>               | LOC: 25,761 | headers:  469
   after: | #include <linux/libata.h>               | LOC: 25,351 | headers:  463

Signed-off-by: Ingo Molnar <mingo@kernel.org>
1 file changed