arm: rmobile: koelsch: Remove CONFIG_USE_ARCH_MEMSET and MEMCPY

Because do not need these feature to koelsch board, this delete it.
Signed-off-by: NNobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>

include/configs/koelsch.h

@@ -55,8 +55,6 @@
 #define CONFIG_DISPLAY_CPUINFO
 #define CONFIG_DISPLAY_BOARDINFO
 #define CONFIG_BOARD_EARLY_INIT_F
-#define CONFIG_USE_ARCH_MEMSET
-#define CONFIG_USE_ARCH_MEMCPY
 #define CONFIG_TMU_TIMER
 
 /* STACK */