Rename BL33_BASE option to PRELOADED_BL33_BASE

To avoid confusion the build option BL33_BASE has been renamed to
PRELOADED_BL33_BASE, which is more descriptive of what it does and
doesn't get mistaken by similar names like BL32_BASE that work in a
completely different way.

NOTE: PLATFORMS USING BUILD OPTION `BL33_BASE` MUST CHANGE TO THE NEW
BUILD OPTION `PRELOADED_BL33_BASE`.

Change-Id: I658925ebe95406edf0325f15aa1752e1782aa45b
diff --git a/bl2/bl2_main.c b/bl2/bl2_main.c
index 73781dd..c8fd683 100644
--- a/bl2/bl2_main.c
+++ b/bl2/bl2_main.c
@@ -169,7 +169,7 @@
 	return e;
 }
 
-#ifndef BL33_BASE
+#ifndef PRELOADED_BL33_BASE
 /*******************************************************************************
  * Load the BL33 image.
  * The bl2_to_bl31_params param will be updated with the relevant BL33
@@ -200,7 +200,7 @@
 
 	return e;
 }
-#endif /* BL33_BASE */
+#endif /* PRELOADED_BL33_BASE */
 
 #endif /* EL3_PAYLOAD_BASE */
 
@@ -277,13 +277,13 @@
 		}
 	}
 
-#ifdef BL33_BASE
+#ifdef PRELOADED_BL33_BASE
 	/*
 	 * In this case, don't load the BL33 image as it's already loaded in
 	 * memory. Update BL33 entrypoint information.
 	 */
 	INFO("BL2: Populating the entrypoint info for the preloaded BL33\n");
-	bl2_to_bl31_params->bl33_ep_info->pc = BL33_BASE;
+	bl2_to_bl31_params->bl33_ep_info->pc = PRELOADED_BL33_BASE;
 	bl2_plat_set_bl33_ep_info(NULL, bl2_to_bl31_params->bl33_ep_info);
 #else
 	e = load_bl33(bl2_to_bl31_params);
@@ -291,7 +291,7 @@
 		ERROR("Failed to load BL33 (%i)\n", e);
 		plat_error_handler(e);
 	}
-#endif /* BL33_BASE */
+#endif /* PRELOADED_BL33_BASE */
 
 #endif /* EL3_PAYLOAD_BASE */