asm-generic: rename termios.h, signal.h and mman.h

The existing asm-generic versions are incomplete and included
by some architectures. New architectures should be able
to use a generic version, so rename the existing files and
change all users, which lets us add the new files.

Signed-off-by: Remis Lima Baima <remis.developer@googlemail.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
diff --git a/arch/ia64/include/asm/signal.h b/arch/ia64/include/asm/signal.h
index 4f5ca56..b166248 100644
--- a/arch/ia64/include/asm/signal.h
+++ b/arch/ia64/include/asm/signal.h
@@ -114,7 +114,7 @@
 
 #endif /* __KERNEL__ */
 
-#include <asm-generic/signal.h>
+#include <asm-generic/signal-defs.h>
 
 # ifndef __ASSEMBLY__