Blackfin: decode new syscalls

* linux/bfin/syscallent.h: Add fanotify/prlimit/cacheflush syscalls.
* linux/syscall.h: Add sys_cacheflush() decl.
* system.c: Decode Blackfin's cacheflush syscall.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
diff --git a/linux/syscall.h b/linux/syscall.h
index 6bfed87..679697f 100644
--- a/linux/syscall.h
+++ b/linux/syscall.h
@@ -334,4 +334,5 @@
 
 #ifdef BFIN
 int sys_sram_alloc();
+int sys_cacheflush();
 #endif