corvus: remove unneeded CONFIG_AT91_LEGACY

Signed-off-by: Andreas Bießmann <andreas.devel@googlemail.com>
Cc: Heiko Schocher <hs@denx.de>

include/configs/corvus.h

@@ -27,7 +27,6 @@
 
 #define CONFIG_SYS_TEXT_BASE  0x73f00000
 
-#define CONFIG_AT91_LEGACY
 #define CONFIG_ATMEL_LEGACY		/* required until (g)pio is fixed */
 
 /* ARM asynchronous clock */