Move board_init_f_mem() into a common location

This function will be used by both SPL and U-Boot proper. So move it into
a common place. Also change the #ifdef so that the early malloc() area is
not set up in SPL if CONFIG_SYS_SPL_MALLOC_START is defined. In that case
it would never actually be used, and just chews up stack space.

Signed-off-by: Simon Glass <sjg@chromium.org>

scripts/Makefile.spl

@@ -52,6 +52,7 @@ libs-y += $(if $(BOARDDIR),board/$(BOARDDIR)/)
 libs-$(HAVE_VENDOR_COMMON_LIB) += board/$(VENDOR)/common/
 
 libs-$(CONFIG_SPL_FRAMEWORK) += common/spl/
+libs-y += common/init/
 libs-$(CONFIG_SPL_LIBCOMMON_SUPPORT) += common/
 libs-$(CONFIG_SPL_LIBDISK_SUPPORT) += disk/
 libs-y += drivers/