loongarch: remove generic-y += termios.h

not really needed - UAPI mandatory-y += termios.h is sufficient...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Acked-by: Huacai Chen <chenhuacai@kernel.org>
Link: https://lore.kernel.org/r/20220821010239.1554132-1-viro@zeniv.linux.org.ukSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

arch/loongarch/include/asm/Kbuild

@@ -21,7 +21,6 @@ generic-y += shmbuf.h
 generic-y += statfs.h
 generic-y += socket.h
 generic-y += sockios.h
-generic-y += termios.h
 generic-y += termbits.h
 generic-y += poll.h
 generic-y += param.h