xilinx: versal: Add PSCI APIs for suspend/resume

Add following APIs in plat_psci to support suspend resume:
- versal_pwr_domain_off
- versal_pwr_domain_suspend
- versal_pwr_domain_suspend_finish
- versal_validate_power_state
- versal_get_sys_suspend_power_state

Signed-off-by: Tejas Patel <tejas.patel@xilinx.com>
Signed-off-by: Rajan Vaja <rajan.vaja@xilinx.com>
Signed-off-by: Jolly Shah <jolly.shah@xilinx.com>
Change-Id: Ife908a45f32e2037c9c19e13211a8e4b373b8342
diff --git a/plat/xilinx/versal/include/platform_def.h b/plat/xilinx/versal/include/platform_def.h
index e61929c..c6be09e 100644
--- a/plat/xilinx/versal/include/platform_def.h
+++ b/plat/xilinx/versal/include/platform_def.h
@@ -75,7 +75,7 @@
  ******************************************************************************/
 #define PLAT_PHY_ADDR_SPACE_SIZE	(1ull << 32)
 #define PLAT_VIRT_ADDR_SPACE_SIZE	(1ull << 32)
-#define MAX_MMAP_REGIONS		7
+#define MAX_MMAP_REGIONS		8
 #define MAX_XLAT_TABLES			5
 
 #define CACHE_WRITEBACK_SHIFT	6