qemu/qemu_sbsa: increase SHARED_RAM_SIZE

Increase SHARED_RAM_SIZE in sbsa_qemu platform from 4KB to 8KB.

sbsa_qemu uses SHARED_RAM for mail box and hold state of each cpus. If
qemu is configured with 512 cpus, region size used by qemu is greater
than 4KB.
Signed-off-by: Masato Fukumori <masato.fukumori@linaro.org>
Change-Id: I639e44e89335249d385cdc339350f509e9bd5e36

plat/qemu/qemu_sbsa/include/platform_def.h

@@ -85,7 +85,7 @@
  */
 
 #define SHARED_RAM_BASE			SEC_SRAM_BASE
-#define SHARED_RAM_SIZE			0x00001000
+#define SHARED_RAM_SIZE			0x00002000
 
 #define PLAT_QEMU_TRUSTED_MAILBOX_BASE	SHARED_RAM_BASE
 #define PLAT_QEMU_TRUSTED_MAILBOX_SIZE	(8 + PLAT_QEMU_HOLD_SIZE)