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/build/feature/test-cplus-demangle.c

extern int printf(const char *format, ...);
extern char *cplus_demangle(const char *, int);

int main(void)
{
	char symbol[4096] = "FieldName__9ClassNameFd";
	char *tmp;

	tmp = cplus_demangle(symbol, 0);

	printf("demangled symbol: {%s}\n", tmp);

	return 0;
}