qemu/qemu_sbsa: topology is different from qemu so add handling

sbsa-ref in QEMU creates clusers of 8 cores, it may create up to 512
cores in upto 64 clusters. Implement a qemu_sbsa specific topology file
and increase the BL31_SIZE to accommodate the bigger table sizes. Change
platform_def.h for new topology. Correct PLATFORM_CPU_PER_CLUSTER_SHIFT so
plat_helpers.S calculates correct result.

Signed-off-by: Graeme Gregory <graeme@nuviainc.com>
Change-Id: Idc5d70394c0956b759ad2c86f9fda8f293f2cfa7
diff --git a/plat/qemu/qemu_sbsa/sbsa_private.h b/plat/qemu/qemu_sbsa/sbsa_private.h
new file mode 100644
index 0000000..29ee1d0
--- /dev/null
+++ b/plat/qemu/qemu_sbsa/sbsa_private.h
@@ -0,0 +1,14 @@
+/*
+ * Copyright (c) 2020, Nuvia Inc
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef SBSA_PRIVATE_H
+#define SBSA_PRIVATE_H
+
+#include <stdint.h>
+
+unsigned int plat_qemu_calc_core_pos(u_register_t mpidr);
+
+#endif /* SBSA_PRIVATE_H */