headers/deps: x86/asm: Optimize <asm/segment.h> dependencies, remove <asm/segment_api.h> inclusion

          --------------------------------------------------------------------
          | Combined, preprocessed C code size of header, without line markers,
          | with comments stripped:
          -------------------------
  before: | #include <asm/segment.h>                | LOC:  1,752 | headers:  104
   after: | #include <asm/segment.h>                | LOC:     20 | headers:   17

Fix dangling dependencies.

Signed-off-by: Ingo Molnar <mingo@kernel.org>
4 files changed