mem_protect: Add mem_protect API

This patch adds the generic code that links the psci smc handler
with the platform function that implements the mem_protect and
mem_check_range functionalities. These functions are  optional
APIs added in PSCI v1.1 (ARM DEN022D).

Change-Id: I3bac1307a5ce2c7a196ace76db8317e8d8c8bb3f
Signed-off-by: Roberto Vargas <roberto.vargas@arm.com>
diff --git a/lib/psci/psci_main.c b/lib/psci/psci_main.c
index 257479a..a5d707e 100644
--- a/lib/psci/psci_main.c
+++ b/lib/psci/psci_main.c
@@ -408,6 +408,11 @@
 		case PSCI_STAT_COUNT_AARCH32:
 			return psci_stat_count(x1, x2);
 #endif
+		case PSCI_MEM_PROTECT:
+			return psci_mem_protect(x1);
+
+		case PSCI_MEM_CHK_RANGE_AARCH32:
+			return psci_mem_chk_range(x1, x2);
 
 		default:
 			break;
@@ -445,6 +450,10 @@
 			return psci_stat_count(x1, x2);
 #endif
 
+		case PSCI_MEM_CHK_RANGE_AARCH64:
+			return psci_mem_chk_range(x1, x2);
+
+
 		default:
 			break;
 		}