feat(tftf): add common header for SIZE macro's

This would be very handy to define macro's with size.
This change is to add common header file with size defines.

Signed-off-by: Vishnu Banavath <vishnu.banavath@arm.com>
Change-Id: I7ddfb7d10a6a8d0a191c6d0019c4730b4b08930c
diff --git a/include/plat/common/common_def.h b/include/plat/common/common_def.h
new file mode 100644
index 0000000..844c0c8
--- /dev/null
+++ b/include/plat/common/common_def.h
@@ -0,0 +1,35 @@
+/*
+ *  Copyright (c) 2022, Arm Limited and Contributors. All rights reserved.
+ *
+ *  SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef _COMMON_DEF_H_
+#define _COMMON_DEF_H_
+
+#define SZ_1K			0x00000400
+#define SZ_2K			0x00000800
+#define SZ_4K			0x00001000
+#define SZ_8K			0x00002000
+#define SZ_16K			0x00004000
+#define SZ_32K			0x00008000
+#define SZ_64K			0x00010000
+#define SZ_128K			0x00020000
+#define SZ_256K			0x00040000
+#define SZ_512K			0x00080000
+
+#define SZ_1M			0x00100000
+#define SZ_2M			0x00200000
+#define SZ_4M			0x00400000
+#define SZ_8M			0x00800000
+#define SZ_16M			0x01000000
+#define SZ_32M			0x02000000
+#define SZ_64M			0x04000000
+#define SZ_128M			0x08000000
+#define SZ_256M			0x10000000
+#define SZ_512M			0x20000000
+
+#define SZ_1G			0x40000000
+#define SZ_2G			0x80000000
+
+#endif /*  _COMMON_DEF_H_ */