Void functions shouldn't return values

Signed-off-by: Ladislav Michl <[e-mail]>
Signed-off-by: Ralf Baechle <[e-mail]>

arch/mips/au1000/pb1000/init.c

···
 		memsize = simple_strtol(memsize_str, NULL, 0);
 	}
 	add_memory_region(0, memsize, BOOT_MEM_RAM);
-	return 0;
 }