at91sam9xeek: fix soc name

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>

Makefile

@@ -2682,7 +2682,7 @@ at91sam9xeek_config	:	unconfig
 		echo "#define CONFIG_SYS_USE_DATAFLASH_CS1 1"	>>$(obj)include/config.h ; \
 		$(XECHO) "... with environment variable in SPI DATAFLASH CS1" ; \
 	fi;
-	@$(MKCONFIG) -n at91sam9xeek -a at91sam9260ek arm arm926ejs at91sam9260ek atmel at91sam9
+	@$(MKCONFIG) -n at91sam9xeek -a at91sam9260ek arm arm926ejs at91sam9260ek atmel at91
 
 at91sam9261ek_nandflash_config \
 at91sam9261ek_dataflash_cs0_config \