sparc64: Fix UP build failure.

sparc_ksyms_64.c includes asm/spinlock.h directly, which is
a no-no.

Even better, none of these exports are even necessary.  All
of these functions are inlines.

Reported by Meelis Roos and Alexander Beregalov.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

arch/sparc/kernel/sparc_ksyms_64.c

@@ -9,7 +9,6 @@
 #include <linux/pci.h>
 #include <linux/init.h>
 
-#include <asm/spinlock.h>
 #include <asm/system.h>
 #include <asm/cpudata.h>
 #include <asm/uaccess.h>
@@ -23,16 +22,6 @@ struct poll {
 	short revents;
 };
 
-/* used by various drivers */
-#ifdef CONFIG_SMP
-/* Out of line rw-locking implementation. */
-EXPORT_SYMBOL(__read_lock);
-EXPORT_SYMBOL(__read_unlock);
-EXPORT_SYMBOL(__write_lock);
-EXPORT_SYMBOL(__write_unlock);
-EXPORT_SYMBOL(__write_trylock);
-#endif /* CONFIG_SMP */
-
 /* from helpers.S */
 EXPORT_SYMBOL(__flushw_user);
 EXPORT_SYMBOL_GPL(real_hard_smp_processor_id);