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/include/asm-generic/Kbuild b/include/asm-generic/Kbuild
index 4c9932a..460b08d 100644
--- a/include/asm-generic/Kbuild
+++ b/include/asm-generic/Kbuild
@@ -2,9 +2,9 @@
 header-y += errno.h
 header-y += fcntl.h
 header-y += ioctl.h
-header-y += mman.h
+header-y += mman-common.h
 header-y += poll.h
-header-y += signal.h
+header-y += signal-defs.h
 header-y += statfs.h
 
 unifdef-y += int-l64.h