h8300: drivers/serial/Kconfig was moved

commit ab4382d2 moved
drivers/serial/Kconfig to drivers/tty/serial/Kconfig, so we need to
source the latter file.
Signed-off-by: NPaul Bolle <pebolle@tiscali.nl>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>

arch/h8300/Kconfig

@@ -195,7 +195,7 @@ config UNIX98_PTYS
 
 source "drivers/char/pcmcia/Kconfig"
 
-source "drivers/serial/Kconfig"
+source "drivers/tty/serial/Kconfig"
 
 source "drivers/i2c/Kconfig"