warp7: Enable Trusted Board Boot for WaRP7

This patch enables Trusted Board Boot for warp7. A subsequent patch
contains build/run instructions.

Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Jun Nie <jun.nie@linaro.org>
diff --git a/plat/imx/imx7/warp7/warp7_rotpk.S b/plat/imx/imx7/warp7/warp7_rotpk.S
new file mode 100644
index 0000000..f74b6d25b
--- /dev/null
+++ b/plat/imx/imx7/warp7/warp7_rotpk.S
@@ -0,0 +1,15 @@
+/*
+ * Copyright (c) 2018, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+	.global warp7_rotpk_hash
+	.global warp7_rotpk_hash_end
+warp7_rotpk_hash:
+	/* DER header */
+	.byte 0x30, 0x31, 0x30, 0x0D, 0x06, 0x09, 0x60, 0x86, 0x48
+	.byte 0x01, 0x65, 0x03, 0x04, 0x02, 0x01, 0x05, 0x00, 0x04, 0x20
+	/* SHA256 */
+	.incbin ROTPK_HASH
+warp7_rotpk_hash_end: