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-bf548.h b/include/configs/cm-bf548.h
index 9630f7d..93c4c8d 100644
--- a/include/configs/cm-bf548.h
+++ b/include/configs/cm-bf548.h
@@ -38,6 +38,9 @@
 /* Values can range from 1-15						*/
 #define CONFIG_SCLK_DIV			4
 
+/* Decrease core voltage */
+#define CONFIG_VR_CTL_VAL (VLEV_115 | GAIN_20 | FREQ_1000)
+
 
 /*
  * Memory Settings
@@ -115,6 +118,8 @@
 #define CONFIG_BOARD_EARLY_INIT_F
 #define CONFIG_RTC_BFIN
 #define CONFIG_UART_CONSOLE	1
+#define CONFIG_BOOTCOMMAND	"run flashboot"
+#define FLASHBOOT_ENV_SETTINGS	"flashboot=bootm 0x20040000\0"
 
 #ifndef __ADSPBF542__
 /* Don't waste time transferring a logo over the UART */