Further fixes to documentation links

Change-Id: Ib021c721652d96f6c06ea18741f19a72bba1d00f
Signed-off-by: John Tsichritzis <john.tsichritzis@arm.com>
diff --git a/docs/getting_started/psci-lib-integration-guide.rst b/docs/getting_started/psci-lib-integration-guide.rst
index f5ea0d7..25936d9 100644
--- a/docs/getting_started/psci-lib-integration-guide.rst
+++ b/docs/getting_started/psci-lib-integration-guide.rst
@@ -544,5 +544,5 @@
 .. _SMCCC: https://silver.arm.com/download/ARM_and_AMBA_Architecture/AR570-DA-80002-r0p0-00rel0/ARM_DEN0028A_SMC_Calling_Convention.pdf
 .. _PSCI specification: http://infocenter.arm.com/help/topic/com.arm.doc.den0022c/DEN0022C_Power_State_Coordination_Interface.pdf
 .. _PSCI Specification: http://infocenter.arm.com/help/topic/com.arm.doc.den0022c/DEN0022C_Power_State_Coordination_Interface.pdf
-.. _Porting Guide: ../getting_started/porting-guide.rst
+.. _Porting Guide: ./porting-guide.rst
 .. _Firmware Design: ../design/firmware-design.rst