Blackfin: update tiny board settings (voltage/default env)

The tinyboards like to run at a little lower voltage than the default, and
they prefer to boot over the network.  For the latter, extend the common
code a little to make this easier.

Also fix the cm-bf527 env sector size while we're in here to reflect the
flash that is actually in use.

Signed-off-by: Harald Krapfenbauer <Harald.Krapfenbauer@bluetechnix.at>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
diff --git a/include/configs/cm-bf537u.h b/include/configs/cm-bf537u.h
index 0ed5960..c1179b0 100644
--- a/include/configs/cm-bf537u.h
+++ b/include/configs/cm-bf537u.h
@@ -131,6 +131,10 @@
 #define CONFIG_MISC_INIT_R
 #define CONFIG_RTC_BFIN
 #define CONFIG_UART_CONSOLE	0
+#define CONFIG_BOOTCOMMAND	"run flashboot"
+#define FLASHBOOT_ENV_SETTINGS \
+	"flashboot=flread 20040000 1000000 280000;" \
+	"bootm 0x1000000\0"
 
 
 /*
@@ -138,13 +142,4 @@
  */
 #include <configs/bfin_adi_common.h>
 
-#undef CONFIG_BOOTCOMMAND
-#define CONFIG_BOOTCOMMAND	"run flashboot"
-
-#undef CONFIG_EXTRA_ENV_SETTINGS
-#define CONFIG_EXTRA_ENV_SETTINGS \
-	NAND_ENV_SETTINGS \
-	NETWORK_ENV_SETTINGS \
-	"flashboot=flread 20040000 1000000 280000; bootm 0x1000000\0"
-
 #endif