[ARM] clean up a load of old declarations

... some of which are now in linux/*.h headers.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/kernel/setup.c

@@ -61,8 +61,7 @@ __setup("fpe=", fpe_setup);
 
 extern void paging_init(struct meminfo *, struct machine_desc *desc);
 extern void reboot_setup(char *str);
-extern int root_mountflags;
-extern void _stext, _text, _etext, __data_start, _edata, _end;
+extern void _text, _etext, __data_start, _edata, _end;
 
 unsigned int processor_id;
 EXPORT_SYMBOL(processor_id);

arch/arm/mm/init.c

@@ -26,8 +26,6 @@
 
 #include "mm.h"
 
-extern void _text, _etext, __data_start, _end, __init_begin, __init_end;
-
 static unsigned long phys_initrd_start __initdata = 0;
 static unsigned long phys_initrd_size __initdata = 0;
 

arch/arm/mm/mm.h

@@ -35,3 +35,5 @@ struct pglist_data;
 void __init create_mapping(struct map_desc *md);
 void __init bootmem_init(struct meminfo *mi);
 void reserve_node_zero(struct pglist_data *pgdat);
+
+extern void _text, _stext, _etext, __data_start, _end, __init_begin, __init_end;

arch/arm/mm/mmu.c

@@ -28,9 +28,6 @@
 
 DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
 
-extern void _stext, _etext, __data_start, _end;
-extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
-
 /*
  * empty_zero_page is a special page that is used for
  * zero-initialized data and COW.

arch/arm/mm/nommu.c

@@ -15,8 +15,6 @@
 
 #include "mm.h"
 
-extern void _stext, __data_start, _end;
-
 /*
  * Reserve the various regions of node 0
  */