Blackfin: new spibootldr command

Newer Blackfin parts can an on-chip ROM that can boot LDRs over SPI flashes,
so add a new 'spibootldr' command to take advantage of it.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
diff --git a/include/configs/bfin_adi_common.h b/include/configs/bfin_adi_common.h
index e0be07b..a581924 100644
--- a/include/configs/bfin_adi_common.h
+++ b/include/configs/bfin_adi_common.h
@@ -71,6 +71,7 @@
 # define CONFIG_CMD_STRINGS
 # if defined(__ADSPBF51x__) || defined(__ADSPBF52x__) || defined(__ADSPBF54x__)
 #  define CONFIG_CMD_OTP
+#  define CONFIG_CMD_SPIBOOTLDR
 # endif
 #endif