m68knommu: create common externs for _ram* vars

Create common extern definitions of _rambase, _ramstart and _ramend
instead of them being externed when used in code.
Signed-off-by: Greg Ungerer <gerg@uclinux.org>

arch/m68k/include/asm/page_no.h

@@ -5,6 +5,9 @@
  
 extern unsigned long memory_start;
 extern unsigned long memory_end;
+extern unsigned long _rambase;
+extern unsigned long _ramstart;
+extern unsigned long _ramend;
 
 #define get_user_page(vaddr)		__get_free_page(GFP_KERNEL)
 #define free_user_page(page, addr)	free_page(addr)

arch/m68k/kernel/setup_no.c

@@ -81,8 +81,6 @@ void (*mach_power_off)(void);
 #define	CPU_INSTR_PER_JIFFY	16
 #endif
 
-extern int _ramstart, _ramend;
-
 #if defined(CONFIG_UBOOT)
 /*
  * parse_uboot_commandline

arch/m68k/mm/init_no.c

@@ -76,7 +76,6 @@ void __init mem_init(void)
 {
 	int codek = 0, datak = 0, initk = 0;
 	unsigned long tmp;
-	extern unsigned int _ramend, _rambase;
 	unsigned long len = _ramend - _rambase;
 	unsigned long start_mem = memory_start; /* DAVIDM - these must start at end of kernel */
 	unsigned long end_mem   = memory_end; /* DAVIDM - this must not include kernel stack at top */