feat(versal): add support for QEMU COSIM platform

QEMU COSIM introduces a new platform id for Versal Platform.
QEMU COSIM is equivalent to QEMU with additional COSIM
extensions, so just switching platform_id to QEMU if QEMU COSIM
id is detected.

Change-Id: If81e0bf04301c7101f89d0df13134f7d04e8c257
Signed-off-by: Akshay Belsare <akshay.belsare@amd.com>
diff --git a/plat/xilinx/versal/include/versal_def.h b/plat/xilinx/versal/include/versal_def.h
index b7691ad..c50df7e 100644
--- a/plat/xilinx/versal/include/versal_def.h
+++ b/plat/xilinx/versal/include/versal_def.h
@@ -30,6 +30,7 @@
 #define VERSAL_SPP                  U(1)
 #define VERSAL_EMU                  U(2)
 #define VERSAL_QEMU                 U(3)
+#define VERSAL_COSIM                U(7)
 
 /* Firmware Image Package */
 #define VERSAL_PRIMARY_CPU	0