sparc64: fix build failure

The following biuld error is observed on sparc64:
  ...
  defs.h:2592:54: error: expected statement before ‘)’ token
   2592 | #define BOOL(ADDR)      LOADER(bool) ((char *)(ADDR)))
        |                                                      ^
  sbitmap.c:425:35: note: in expansion of macro ‘BOOL’
    425 |                 sc->round_robin = BOOL(sbitmap_buf + OFFSET(sbitmap_round_robin));
        |                                   ^~~~
  make[5]: *** [Makefile:395: sbitmap.o] Error 1

The round brackets are not paired, let's fix it.

Signed-off-by: Lianbo Jiang <[email protected]>

Author: lian-bo

defs.h

@@ -2589,7 +2589,7 @@ DEF_LOADER(bool);
 #define SHORT(ADDR)     LOADER(short) ((char *)(ADDR))
 #define UCHAR(ADDR)     *((unsigned char *)((char *)(ADDR)))
 #define VOID_PTR(ADDR)  ((void *) (LOADER(pointer_t) ((char *)(ADDR))))
-#define BOOL(ADDR)      LOADER(bool) ((char *)(ADDR)))
+#define BOOL(ADDR)      LOADER(bool) ((char *)(ADDR))
 
 #else