mx5: Remove unnecessary CONFIG_SYS_BOOTMAPSZ definition

Since the following commit, definition CONFIG_SYS_BOOTMAPSZ is not
needed any more.

  ed59e58786cae9f8afcb575649afc65985beed4d
  Remove device tree booting dependency on CONFIG_SYS_BOOTMAPSZ

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
diff --git a/include/configs/mx51evk.h b/include/configs/mx51evk.h
index 6a785f8..febe8d8 100644
--- a/include/configs/mx51evk.h
+++ b/include/configs/mx51evk.h
@@ -227,6 +227,5 @@
 #define CONFIG_SYS_MMC_ENV_DEV 0
 
 #define CONFIG_OF_LIBFDT
-#define CONFIG_SYS_BOOTMAPSZ   0x800000
 
 #endif
diff --git a/include/configs/mx53evk.h b/include/configs/mx53evk.h
index 5749a08..74aee89 100644
--- a/include/configs/mx53evk.h
+++ b/include/configs/mx53evk.h
@@ -193,6 +193,5 @@
 #define CONFIG_SYS_MMC_ENV_DEV 0
 
 #define CONFIG_OF_LIBFDT
-#define CONFIG_SYS_BOOTMAPSZ   0x800000
 
 #endif				/* __CONFIG_H */