Input: i8042 - select ARCH_MIGHT_HAVE_PC_SERIO for SH_CAYMAN

Architectures which might use an i8042 for serial IO to keyboard,
mouse, etc should select ARCH_MIGHT_HAVE_PC_SERIO. Cayman board
is only sh board which needs this.
Signed-off-by: Mark Salter <msalter@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

arch/sh/boards/Kconfig

@@ -321,6 +321,7 @@ config SH_CAYMAN
 	bool "Hitachi Cayman"
 	depends on CPU_SUBTYPE_SH5_101 || CPU_SUBTYPE_SH5_103
 	select SYS_SUPPORTS_PCI
+	select ARCH_MIGHT_HAVE_PC_SERIO
 
 config SH_POLARIS
 	bool "SMSC Polaris"