env_sf: Move conditional compilation to Makefile

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>

common/Makefile

@@ -56,7 +56,7 @@ COBJS-y += env_flash.o
 COBJS-$(CONFIG_ENV_IS_IN_NAND) += env_nand.o
 COBJS-$(CONFIG_ENV_IS_IN_NVRAM) += env_nvram.o
 COBJS-$(CONFIG_ENV_IS_IN_ONENAND) += env_onenand.o
-COBJS-y += env_sf.o
+COBJS-$(CONFIG_ENV_IS_IN_SPI_FLASH) += env_sf.o
 COBJS-y += env_nowhere.o
 
 # command

common/env_sf.c

@@ -26,9 +26,6 @@
  * MA 02111-1307 USA
  */
 #include <common.h>
-
-#ifdef CONFIG_ENV_IS_IN_SPI_FLASH
-
 #include <environment.h>
 #include <spi_flash.h>
 
@@ -135,5 +132,3 @@ int env_init(void)
 
 	return 0;
 }
-
-#endif /* CONFIG_ENV_IS_IN_SPI_FLASH */