common: Move RAM-sizing functions to init.h

These functions relate to memory init so move them into the init
header.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/include/common.h b/include/common.h
index c69bad9..f9ad184 100644
--- a/include/common.h
+++ b/include/common.h
@@ -59,10 +59,6 @@
 
 #include <display_options.h>
 
-/* common/memsize.c */
-long	get_ram_size  (long *, long);
-phys_size_t get_effective_memsize(void);
-
 #if defined(CONFIG_SYS_DRAM_TEST)
 int testdram(void);
 #endif /* CONFIG_SYS_DRAM_TEST */
diff --git a/include/init.h b/include/init.h
index c549847..cb92c6a 100644
--- a/include/init.h
+++ b/include/init.h
@@ -106,6 +106,9 @@
  */
 int dram_init_banksize(void);
 
+long get_ram_size(long *base, long size);
+phys_size_t get_effective_memsize(void);
+
 /**
  * arch_reserve_stacks() - Reserve all necessary stacks
  *