[SPARC64]: Use Makefile to control dec_and_lock.o building not in-file ifdefs.

arch/sparc64/lib/Makefile

@@ -9,5 +9,7 @@ lib-y := PeeCeeI.o blockops.o debuglocks.o strlen.o strncmp.o \
 	 memscan.o strncpy_from_user.o strlen_user.o memcmp.o checksum.o \
 	 VIScopy.o VISbzero.o VISmemset.o VIScsum.o VIScsumcopy.o \
 	 VIScsumcopyusr.o VISsave.o atomic.o rwlock.o bitops.o \
-	 dec_and_lock.o U3memcpy.o U3copy_from_user.o U3copy_to_user.o \
+	 U3memcpy.o U3copy_from_user.o U3copy_to_user.o \
 	 U3copy_in_user.o mcount.o ipcsum.o rwsem.o xor.o
+
+lib-$(CONFIG_HAVE_DEC_LOCK) += dec_and_lock.o

arch/sparc64/lib/dec_and_lock.S

@@ -7,7 +7,6 @@
 #include <linux/config.h>
 #include <asm/thread_info.h>
 
-#ifndef CONFIG_DEBUG_SPINLOCK
 	.text
 	.align	64
 
@@ -76,5 +75,3 @@ spin_on_lock:
 	ba,pt	%xcc, to_zero
 	 nop
 	nop
-
-#endif /* !(CONFIG_DEBUG_SPINLOCK) */