Drop CONFIG_ISA_KEYBOARD

This option is mentioned but does not do anything. Drop it.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/README b/README
index a0b6c89..15016ce 100644
--- a/README
+++ b/README
@@ -1767,11 +1767,6 @@
 		a default value of 65536 will be defined.
 
 - Keyboard Support:
-		CONFIG_ISA_KEYBOARD
-
-		Define this to enable standard (PC-Style) keyboard
-		support
-
 		CONFIG_I8042_KBD
 		Standard PC keyboard driver with US (is default) and
 		GERMAN key layout (switch via environment 'keymap=de') support.
diff --git a/board/mpl/pip405/README b/board/mpl/pip405/README
index 012db1c..1b73dbe 100644
--- a/board/mpl/pip405/README
+++ b/board/mpl/pip405/README
@@ -114,10 +114,6 @@
 ----
 CONFIG_RTC_MC146818		MC146818 RTC support
 
-Keyboard:
----------
-CONFIG_ISA_KEYBOARD		Standard (PC-Style) Keyboard support
-
 Video:
 ------
 CONFIG_VIDEO_CT69000		Enable Chips & Technologies 69000 Video chip
diff --git a/include/configs/MIP405.h b/include/configs/MIP405.h
index ec62c8a..ba93c18 100644
--- a/include/configs/MIP405.h
+++ b/include/configs/MIP405.h
@@ -362,11 +362,6 @@
 #define CONFIG_ISO_PARTITION /* Experimental */
 
 /************************************************************
- * Keyboard support
- ************************************************************/
-#undef CONFIG_ISA_KEYBOARD
-
-/************************************************************
  * Video support
  ************************************************************/
 #define CONFIG_VIDEO			/*To enable video controller support */
diff --git a/include/configs/PIP405.h b/include/configs/PIP405.h
index 45eecc4..aac5a4d 100644
--- a/include/configs/PIP405.h
+++ b/include/configs/PIP405.h
@@ -319,11 +319,6 @@
 #define CONFIG_ISO_PARTITION /* Experimental */
 
 /************************************************************
- * Keyboard support
- ************************************************************/
-#define CONFIG_ISA_KEYBOARD
-
-/************************************************************
  * Video support
  ************************************************************/
 #define CONFIG_VIDEO			/*To enable video controller support */