allwinner: Add SPC security setup for H6

The H6 has a "secure port controller" similar to the A64/H5, but with
more ports and a different register layout. Split the platform-specific
parts out into a header, and add the missing MMIO base address.

Signed-off-by: Samuel Holland <samuel@sholland.org>
Change-Id: I3703868bc595459ecf9568b9d1605cb1be014bf5
diff --git a/plat/allwinner/sun50i_h6/include/sunxi_spc.h b/plat/allwinner/sun50i_h6/include/sunxi_spc.h
new file mode 100644
index 0000000..0f5965b
--- /dev/null
+++ b/plat/allwinner/sun50i_h6/include/sunxi_spc.h
@@ -0,0 +1,16 @@
+/*
+ * Copyright (c) 2020, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef SUNXI_SPC_H
+#define SUNXI_SPC_H
+
+#define SUNXI_SPC_NUM_PORTS		14
+
+#define SUNXI_SPC_DECPORT_STA_REG(p)	(SUNXI_SPC_BASE + 0x0000 + 0x10 * (p))
+#define SUNXI_SPC_DECPORT_SET_REG(p)	(SUNXI_SPC_BASE + 0x0004 + 0x10 * (p))
+#define SUNXI_SPC_DECPORT_CLR_REG(p)	(SUNXI_SPC_BASE + 0x0008 + 0x10 * (p))
+
+#endif /* SUNXI_SPC_H */