feat(sgi): bump bl1 rw size

Increase BL1 RW size by 16 KiB to accommodate for future development.

Signed-off-by: Vijayenthiran Subramaniam <vijayenthiran.subramaniam@arm.com>
Change-Id: I21626a97de4a6c98c25b93b9f79e16325c6e4349
diff --git a/plat/arm/css/sgi/include/sgi_base_platform_def.h b/plat/arm/css/sgi/include/sgi_base_platform_def.h
index 8724074..22870c4 100644
--- a/plat/arm/css/sgi/include/sgi_base_platform_def.h
+++ b/plat/arm/css/sgi/include/sgi_base_platform_def.h
@@ -68,7 +68,7 @@
  * PLAT_ARM_MAX_BL1_RW_SIZE is calculated using the current BL1 RW debug size
  * plus a little space for growth.
  */
-#define PLAT_ARM_MAX_BL1_RW_SIZE	0xC000
+#define PLAT_ARM_MAX_BL1_RW_SIZE	(64 * 1024)	/* 64 KB */
 
 /*
  * PLAT_ARM_MAX_ROMLIB_RW_SIZE is define to use a full page