prism: HNVRAM_UINT8 vars to be read as binary

Previously HNVRAM_UINT8 vars appeared blank in uboot
since it was trying to display the raw hex values:
(0x00, ^A). Now they will be displayed the same way
HNVRAM_HEXSTRING is displayed.

Change-Id: If70c4aa9c17e98197f8ebe9c4552c36a4c2bc9d1
diff --git a/common/cmd_hnvram.c b/common/cmd_hnvram.c
index dec728a..24b302c 100644
--- a/common/cmd_hnvram.c
+++ b/common/cmd_hnvram.c
@@ -52,6 +52,8 @@
 /* these keys are stored in binary format for historical reasons */
 const char *hnvram_binary_keys[] = {
 	"LOADER_VERSION",
+	"ACTIVATED_KERNEL_NUM",
+	"HW_VER",
 	"HDCP_KEY",
 	"DTCP_KEY",
 };