nvdimm: constify device_type structures

Declare device_type structure as const as it is only stored in the
type field of a device structure. This field is of type const, so add
const to declaration of device_type structure.

File size before:
  text	   data	    bss	    dec	    hex	filename
  19278	   3199	     16	  22493	   57dd	nvdimm/namespace_devs.o

File size after:
  text	   data	    bss	    dec	    hex	filename
  19929	   3160	     16	  23105	   5a41	nvdimm/namespace_devs.o

Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

path: root/tools/perf/util/data-convert-bt.h

#ifndef __DATA_CONVERT_BT_H
#define __DATA_CONVERT_BT_H
#include "data-convert.h"
#ifdef HAVE_LIBBABELTRACE_SUPPORT

int bt_convert__perf2ctf(const char *input_name, const char *to_ctf,
			 struct perf_data_convert_opts *opts);

#endif /* HAVE_LIBBABELTRACE_SUPPORT */
#endif /* __DATA_CONVERT_BT_H */