configs: apalis-tk1: Do not define CONFIG_SYS_BOOT_RAMDISK_HIGH again

CONFIG_SYS_BOOT_RAMDISK_HIGH is already defined in
arch/arm/include/asm/config.h:10:#define CONFIG_SYS_BOOT_RAMDISK_HIGH
that's why there is no reason to define it again in board file.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>

include/configs/apalis-tk1.h

@@ -138,8 +138,6 @@
 
 #define CONFIG_CMD_TIME
 
-#define CONFIG_SYS_BOOT_RAMDISK_HIGH
-
 #include "tegra-common-usb-gadget.h"
 #include "tegra-common-post.h"