include: configs: Add gunzip size for HiKey board

Default 8MB gunzip size is not enough to load the release kernel, hence
fix 64MB size for uncompressing the kernel.

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/include/configs/hikey.h b/include/configs/hikey.h
index 1376d61..572a52f 100644
--- a/include/configs/hikey.h
+++ b/include/configs/hikey.h
@@ -18,6 +18,8 @@
 
 #define CONFIG_REMAKE_ELF
 
+#define CONFIG_SYS_BOOTM_LEN		SZ_64M
+
 /* Physical Memory Map */
 
 /* CONFIG_SYS_TEXT_BASE needs to align with where ATF loads bl33.bin */