fix: set initrd_high for initrd size too big

Signed-off-by: Han Gao <gaohan@iscas.ac.cn>
Signed-off-by: Han Gao <rabenda.cn@gmail.com>

include/configs/light-c910.h

@@ -144,6 +144,7 @@
 	"dtb_addr=0x03800000\0" \
 	"fdt_addr_r=0x03800000\0" \
 	"fdtoverlay_addr_r=0x03700000\0" \
+	"initrd_high=0x1a000000\0" \
 	"kernel_addr_r=0x00200000\0" \
 	"ramdisk_addr_r=0x06000000\0" \
 	"boot_conf_addr_r=0xc0000000\0" \