m68k: Kill several external declarations in source files

- Replace external declarations by proper includes where availiable.
    The accesses to some symbols had to be modified, as before they were
    declared using e.g. "extern int _end", while asm-generic/sections.h uses
    e.g. "extern char _end[]"
  - Remove unused or superfluous external declarations

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>

arch/m68k/sun3/config.c

@@ -27,23 +27,21 @@
 #include <asm/sun3mmu.h>
 #include <asm/rtc.h>
 #include <asm/machdep.h>
+#include <asm/idprom.h>
 #include <asm/intersil.h>
 #include <asm/irq.h>
+#include <asm/sections.h>
 #include <asm/segment.h>
 #include <asm/sun3ints.h>
 
-extern char _text, _end;
-
 char sun3_reserved_pmeg[SUN3_PMEGS_NUM];
 
 extern unsigned long sun3_gettimeoffset(void);
 static void sun3_sched_init(irq_handler_t handler);
 extern void sun3_get_model (char* model);
-extern void idprom_init (void);
 extern int sun3_hwclk(int set, struct rtc_time *t);
 
 volatile char* clock_va;
-extern volatile unsigned char* sun3_intreg;
 extern unsigned long availmem;
 unsigned long num_pages;
 
@@ -149,7 +147,7 @@ void __init config_sun3(void)
 	mach_halt	     =  sun3_halt;
 	mach_get_hardware_list = sun3_get_hardware_list;
 
-	memory_start = ((((int)&_end) + 0x2000) & ~0x1fff);
+	memory_start = ((((unsigned long)_end) + 0x2000) & ~0x1fff);
 // PROM seems to want the last couple of physical pages. --m
 	memory_end   = *(romvec->pv_sun3mem) + PAGE_OFFSET - 2*PAGE_SIZE;