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/powerpc/include/asm/termios.h b/arch/powerpc/include/asm/termios.h
index 2c14fea..a24f487 100644
--- a/arch/powerpc/include/asm/termios.h
+++ b/arch/powerpc/include/asm/termios.h
@@ -78,7 +78,7 @@
 
 #ifdef __KERNEL__
 
-#include <asm-generic/termios.h>
+#include <asm-generic/termios-base.h>
 
 #endif	/* __KERNEL__ */