[PATCH] remove asm-xtensa/ipc.h

Now that sys_ipc has been removed from xtensa, asm/ipc.h is no longer
needed for that architecture.  Not tested, but obviously correct.  This
file is included only from arch code and this patch also removes the only
inclusion.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/xtensa/kernel/syscalls.c

@@ -42,7 +42,6 @@
 #include <asm/mman.h>
 #include <asm/shmparam.h>
 #include <asm/page.h>
-#include <asm/ipc.h>
 
 extern void do_syscall_trace(void);
 typedef int (*syscall_t)(void *a0,...);