powerpc: Cleanup BOOTFLAG_* references

Now that warm booting is not supported, there isn't a need for the
BOOTFLAG_COLD and BOOTFLAG_WARM defines, so remove them.

Note that this change makes the board info bd_bootflags field useless.
It will always be set to 0, but we leave it around so that we don't
break the board info structure that some OSes are expecting to be passed
from U-Boot.

Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
diff --git a/include/configs/ZPC1900.h b/include/configs/ZPC1900.h
index d305fa4..0eabf37 100644
--- a/include/configs/ZPC1900.h
+++ b/include/configs/ZPC1900.h
@@ -215,10 +215,8 @@
 #define CONFIG_SYS_HRCW_SLAVE6		0
 #define CONFIG_SYS_HRCW_SLAVE7		0
 
-#define BOOTFLAG_COLD		0x01	/* Normal Power-On: Boot from FLASH */
-#define BOOTFLAG_WARM		0x02	/* Software reboot                  */
-
 #define CONFIG_SYS_MONITOR_BASE	CONFIG_SYS_TEXT_BASE
+
 #if (CONFIG_SYS_MONITOR_BASE < CONFIG_SYS_FLASH_BASE)
 #define CONFIG_SYS_RAMBOOT
 #endif