Use _bss_start_ofs as the size of the boot loader code+data that we want
to protect in the flash. This replaces use of the no longer defined
_armboot_start.
Fixes:
flash.c: In function ‘flash_init’:
flash.c:75: error: ‘_bss_start’ undeclared (first use in this function)
flash.c:75: error: (Each undeclared identifier is reported only once
flash.c:75: error: for each function it appears in.)
flash.c:75: error: ‘_armboot_start’ undeclared (first use in this function)
Signed-off-by: <greg.ungerer@opengear.com>
         */
        flash_protect (FLAG_PROTECT_SET,
                       CONFIG_SYS_FLASH_BASE,
-                      CONFIG_SYS_FLASH_BASE + _bss_start - _armboot_start,
+                      CONFIG_SYS_FLASH_BASE + _bss_start_ofs,
                       &flash_info[0]);
 
        return size;
 
         */
        flash_protect (FLAG_PROTECT_SET,
                       CONFIG_SYS_FLASH_BASE,
-                      CONFIG_SYS_FLASH_BASE + _bss_start - _armboot_start,
+                      CONFIG_SYS_FLASH_BASE + _bss_start_ofs,
                       &flash_info[0]);
 
        return size;