Convert CONFIG_SYS_INTERLAKEN et al to Kconfig

This converts the following to Kconfig:
   CONFIG_SYS_INTERLAKEN
   CONFIG_SYS_ISA_IO
   CONFIG_SYS_ISA_IO_BASE_ADDRESS

Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/rtc/mc146818.c b/drivers/rtc/mc146818.c
index 71f96e2..122691b 100644
--- a/drivers/rtc/mc146818.c
+++ b/drivers/rtc/mc146818.c
@@ -22,7 +22,7 @@
 /* Set this to 1 to clear the CMOS RAM */
 #define CLEAR_CMOS		0
 
-#define RTC_PORT_MC146818	CONFIG_SYS_ISA_IO_BASE_ADDRESS + 0x70
+#define RTC_PORT_MC146818	0x70
 #define RTC_SECONDS		0x00
 #define RTC_SECONDS_ALARM	0x01
 #define RTC_MINUTES		0x02