Input: i8042 - select ARCH_MIGHT_HAVE_PC_SERIO on powerpc

Architectures which might use an i8042 for serial IO to keyboard,
mouse, etc should select ARCH_MIGHT_HAVE_PC_SERIO.
Signed-off-by: NMark Salter <msalter@redhat.com>
Acked-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

arch/powerpc/Kconfig

@@ -86,6 +86,7 @@ config PPC
 	bool
 	default y
 	select ARCH_MIGHT_HAVE_PC_PARPORT
+	select ARCH_MIGHT_HAVE_PC_SERIO
 	select BINFMT_ELF
 	select OF
 	select OF_EARLY_FLATTREE