Drop CONFIG_SYS_PIO_MODE

This option is not used in U-Boot. Drop it.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Stefan Roese <sr@denx.de>
diff --git a/include/configs/r2dplus.h b/include/configs/r2dplus.h
index 49dcdbe..04b3481 100644
--- a/include/configs/r2dplus.h
+++ b/include/configs/r2dplus.h
@@ -30,11 +30,6 @@
 #define	CONFIG_SYS_PLL_SETTLING_TIME	100/* in us */
 
 /*
- * IDE support
- */
-#define CONFIG_SYS_PIO_MODE		1
-
-/*
  * SuperH PCI Bridge Configration
  */
 #define CONFIG_SH7751_PCI
diff --git a/scripts/config_whitelist.txt b/scripts/config_whitelist.txt
index 4967429..7e72b96 100644
--- a/scripts/config_whitelist.txt
+++ b/scripts/config_whitelist.txt
@@ -1789,7 +1789,6 @@
 CONFIG_SYS_PIOC_PPUDR_VAL
 CONFIG_SYS_PIOD_PDR_VAL1
 CONFIG_SYS_PIOD_PPUDR_VAL
-CONFIG_SYS_PIO_MODE
 CONFIG_SYS_PJPAR
 CONFIG_SYS_PL310_BASE
 CONFIG_SYS_PLLAR_VAL