fix(psci): modify variable conflicting with external function

This corrects the MISRA violation C2012-5.8:
Identifiers that define objects or functions with
external linkage shall be unique.
Modify the variable name to prevent conflict with
external function declaration

Change-Id: I2f109242b6dd3b3c5e9289881e3dd5466c74fcb5
Signed-off-by: Nithin G <nithing@amd.com>
Signed-off-by: Maheedhar Bollapalli <maheedharsai.bollapalli@amd.com>
diff --git a/lib/psci/psci_off.c b/lib/psci/psci_off.c
index 577fdd7..932a039 100644
--- a/lib/psci/psci_off.c
+++ b/lib/psci/psci_off.c
@@ -94,7 +94,7 @@
 	if ((psci_spd_pm != NULL) && (psci_spd_pm->svc_off != NULL)) {
 		rc = psci_spd_pm->svc_off(0);
 		if (rc != PSCI_E_SUCCESS)
-			goto exit;
+			goto off_exit;
 	}
 
 	/*
@@ -127,7 +127,7 @@
 	plat_psci_stat_accounting_start(&state_info);
 #endif
 
-exit:
+off_exit:
 	/*
 	 * Release the locks corresponding to each power level in the
 	 * reverse order to which they were acquired.