powerpc: MPC8568MDS: Remove macro CONFIG_MPC8568MDS

This macro is no longer used.

Signed-off-by: York Sun <york.sun@nxp.com>
diff --git a/include/configs/MPC8568MDS.h b/include/configs/MPC8568MDS.h
index 18adc6f..e7adb17 100644
--- a/include/configs/MPC8568MDS.h
+++ b/include/configs/MPC8568MDS.h
@@ -13,7 +13,6 @@
 /* High Level Configuration Options */
 #define CONFIG_BOOKE		1	/* BOOKE */
 #define CONFIG_E500		1	/* BOOKE e500 family */
-#define CONFIG_MPC8568MDS	1	/* MPC8568MDS board specific */
 
 #define	CONFIG_SYS_TEXT_BASE	0xfff80000
 
diff --git a/scripts/config_whitelist.txt b/scripts/config_whitelist.txt
index c6f12d0..020bbcc 100644
--- a/scripts/config_whitelist.txt
+++ b/scripts/config_whitelist.txt
@@ -3141,7 +3141,6 @@
 CONFIG_MPC83XX_PCI2
 CONFIG_MPC850
 CONFIG_MPC855
-CONFIG_MPC8568MDS
 CONFIG_MPC8569
 CONFIG_MPC8569MDS
 CONFIG_MPC857