avr32/hsdramc: Move conditional compilation to Makefile

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj <at> jcrosoft.com>
Cc: Haavard Skinnemoen <haavard.skinnemoen <at> atmel.com>

cpu/at32ap/Makefile

@@ -30,7 +30,7 @@ LIB	:= $(obj)lib$(CPU).a
 START-y			+= start.o
 
 COBJS-y			+= cpu.o
-COBJS-y			+= hsdramc.o
+COBJS-$(CONFIG_SYS_HSDRAMC) += hsdramc.o
 COBJS-y			+= exception.o
 COBJS-y			+= cache.o
 COBJS-y			+= interrupts.o

cpu/at32ap/hsdramc.c

@@ -21,7 +21,6 @@
  */
 #include <common.h>
 
-#ifdef CONFIG_SYS_HSDRAMC
 #include <asm/io.h>
 #include <asm/sdram.h>
 
@@ -116,5 +115,3 @@ unsigned long sdram_init(void *sdram_base, const struct sdram_config *config)
 
 	return sdram_size;
 }
-
-#endif /* CONFIG_SYS_HSDRAMC */