M28: Cleanup memsize.o OOT build

The current way memsize.c is built just made a symlink into the directory
with SPL and then compiled it like any other file there. This was bad as that
broke the out-of-tree build.

The new way introduced in this patch uses the standard spl/Makefile methods
(CONFIG_SPL_LIBCOMMON_SUPPORT / CONFIG_SPL_LIBGENERIC_SUPPORT) to let files in
common/ be built. Because common/Makefile says memsize.c is always built (SPL
and non-SPL build), this fixes our issue with memsize.c out-of-tree build.

Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Cc: Wolfgang Denk <wd@denx.de>
Cc: Detlev Zundel <dzu@denx.de>
Cc: Stefano Babic <sbabic@denx.de>

arch/arm/cpu/arm926ejs/mx28/Makefile

@@ -28,7 +28,7 @@ LIB	= $(obj)lib$(SOC).o
 COBJS	= clock.o mx28.o iomux.o timer.o
 
 ifdef	CONFIG_SPL_BUILD
-COBJS	+= memsize.o spl_boot.o spl_mem_init.o spl_power_init.o
+COBJS	+= spl_boot.o spl_mem_init.o spl_power_init.o
 endif
 
 SRCS	:= $(START:.o=.S) $(COBJS:.o=.c)
@@ -40,11 +40,6 @@ all:	$(obj).depend $(LIB)
 $(LIB):	$(OBJS)
 	$(call cmd_link_o_target, $(OBJS))
 
-ifdef	CONFIG_SPL_BUILD
-memsize.c:
-	ln -sf $(TOPDIR)/common/memsize.c $@
-endif
-
 #########################################################################
 
 # defines $(obj).depend target

arch/arm/cpu/arm926ejs/mx28/spl_boot.c

@@ -68,17 +68,8 @@ inline void board_init_r(gd_t *id, ulong dest_addr)
 		;
 }
 
-inline int printf(const char *fmt, ...)
-{
-	return 0;
-}
-
-inline void __coloured_LED_init(void) {}
-inline void __red_LED_on(void) {}
-void coloured_LED_init(void)
-	__attribute__((weak, alias("__coloured_LED_init")));
-void red_LED_on(void)
-	__attribute__((weak, alias("__red_LED_on")));
+void serial_putc(const char c) {}
+void serial_puts(const char *s) {}
 void hang(void) __attribute__ ((noreturn));
 void hang(void)
 {

arch/arm/cpu/arm926ejs/mx28/u-boot-spl.lds

@@ -67,16 +67,16 @@ SECTIONS
 		*(.dynsym)
 	}
 
-	_end = .;
-
-	.bss __rel_dyn_start (OVERLAY) : {
+	.bss : {
+		. = ALIGN(4);
 		__bss_start = .;
-		*(.bss)
-		 . = ALIGN(4);
+		*(.bss*)
+		. = ALIGN(4);
 		__bss_end__ = .;
 	}
 
-	/DISCARD/ : { *(.bss*) }
+	_end = .;
+
 	/DISCARD/ : { *(.dynstr*) }
 	/DISCARD/ : { *(.dynsym*) }
 	/DISCARD/ : { *(.dynamic*) }

include/configs/m28evk.h

@@ -50,6 +50,8 @@
 #define	CONFIG_SPL_NO_CPU_SUPPORT_CODE
 #define	CONFIG_SPL_START_S_PATH		"arch/arm/cpu/arm926ejs/mx28"
 #define	CONFIG_SPL_LDSCRIPT	"arch/arm/cpu/arm926ejs/mx28/u-boot-spl.lds"
+#define	CONFIG_SPL_LIBCOMMON_SUPPORT
+#define	CONFIG_SPL_LIBGENERIC_SUPPORT
 
 /*
  * U-Boot Commands