tile: move declaration of sys_call_table to <asm/syscall.h>

When activating syscall tracing, kernel/trace/trace_syscalls.c doesn't
find sys_call_table because it includes <asm/syscall.h>, not
<asm/syscalls.h>. Also, looking at the other architectures, that is
probably where it should be.

Signed-off-by: Simon Marchi <simon.marchi@polymtl.ca>
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>

arch/tile/include/asm/syscall.h

@@ -22,6 +22,12 @@
 #include <linux/err.h>
 #include <arch/abi.h>
 
+/* The array of function pointers for syscalls. */
+extern void *sys_call_table[];
+#ifdef CONFIG_COMPAT
+extern void *compat_sys_call_table[];
+#endif
+
 /*
  * Only the low 32 bits of orig_r0 are meaningful, so we return int.
  * This importantly ignores the high bits on 64-bit, so comparisons

arch/tile/include/asm/syscalls.h

@@ -24,12 +24,6 @@
 #include <linux/types.h>
 #include <linux/compat.h>
 
-/* The array of function pointers for syscalls. */
-extern void *sys_call_table[];
-#ifdef CONFIG_COMPAT
-extern void *compat_sys_call_table[];
-#endif
-
 /*
  * Note that by convention, any syscall which requires the current
  * register set takes an additional "struct pt_regs *" pointer; a