mvebu: armada-8k: respect CONFIG_DISTRO_DEFAULTS

Currently, Armada 8k config header is setting boot devices and including
<config_distro_bootcmd.h> regardless of the CONFIG_DISTRO_DEFAULTS being
enabled or not, thus populating the environment for distro boot even on
devices that have no need for it.

So, lets simply respect the value of CONFIG_DISTRO_DEFAULTS.

Signed-off-by: Robert Marko <robimarko@gmail.com>
diff --git a/include/configs/mvebu_armada-8k.h b/include/configs/mvebu_armada-8k.h
index 239a097..6fedbe9 100644
--- a/include/configs/mvebu_armada-8k.h
+++ b/include/configs/mvebu_armada-8k.h
@@ -30,7 +30,7 @@
 /*
  * PCI configuration
  */
-
+#ifdef CONFIG_DISTRO_DEFAULTS
 #define BOOT_TARGET_DEVICES(func) \
 	func(MMC, mmc, 1) \
 	func(MMC, mmc, 0) \
@@ -40,6 +40,9 @@
 	func(DHCP, dhcp, na)
 
 #include <config_distro_bootcmd.h>
+#else
+#define BOOTENV
+#endif
 
 #define CFG_EXTRA_ENV_SETTINGS	\
 	"scriptaddr=0x6d00000\0"	\