s390: Remove unused declaration of zfcpdump_prefix_array[]

Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

arch/s390/include/asm/ipl.h

@@ -87,7 +87,6 @@ struct ipl_parameter_block {
  */
 extern u32 ipl_flags;
 extern u32 dump_prefix_page;
-extern unsigned int zfcpdump_prefix_array[];
 
 struct dump_save_areas {
 	struct save_area **areas;