M68KNOMMU: remove unused config symbol CONFIG_DISKtel

Remove unused config symbol CONFIG_DISKtel.
Pointed out by Robert P. J. Day <rpjday@mindspring.com>.
Signed-off-by: NGreg Ungerer <gerg@uclinux.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

include/asm-m68knommu/system.h

@@ -253,8 +253,7 @@ cmpxchg(volatile int *p, int old, int new)
         ");				\
 })
 #elif defined(CONFIG_NETtel) || defined(CONFIG_eLIA) || \
-      defined(CONFIG_DISKtel) || defined(CONFIG_SECUREEDGEMP3) || \
-      defined(CONFIG_CLEOPATRA)
+      defined(CONFIG_SECUREEDGEMP3) || defined(CONFIG_CLEOPATRA)
 #define HARD_RESET_NOW() ({		\
         asm("				\
 	movew #0x2700, %sr;		\