Fix broken links in docs

Change-Id: If82aaba9f2a5a74cfb5e4381f968166037a70037
Signed-off-by: Madhukar Pappireddy <madhukar.pappireddy@arm.com>

docs/components/exception-handling.rst

@@ -233,12 +233,11 @@ The text in `Partitioning priority levels`_ only describes how the platform
 expresses the required levels of priority. It however doesn't choose interrupts
 nor program the required priority in GIC.
 
-The `Firmware Design guide`__ explains methods for configuring secure
-interrupts. |EHF| requires the platform to enumerate interrupt properties (as
-opposed to just numbers) of Secure interrupts. The priority of secure interrupts
-must match that as determined in the `Partitioning priority levels`_ section above.
-
-.. __: firmware-design.rst#configuring-secure-interrupts
+The :ref:`Firmware Design guide<configuring-secure-interrupts>` explains methods
+for configuring secure interrupts. |EHF| requires the platform to enumerate
+interrupt properties (as opposed to just numbers) of Secure interrupts. The
+priority of secure interrupts must match that as determined in the
+`Partitioning priority levels`_ section above.
 
 See `Limitations`_, and also refer to `Interrupt handling example`_ for
 illustration.

docs/components/secure-partition-manager.rst

@@ -126,7 +126,7 @@ The following TF-A build options are provisioned:
    restoring) the EL2 system register context before entering (resp.
    after leaving) the SPMC. It is mandatory when ``SPMD_SPM_AT_SEL2`` is
    enabled. The context save/restore routine and exhaustive list of
-   registers is visible at `[4] <#References>`__.
+   registers is visible at `[4]`_.
 -  **SP_LAYOUT_FILE**: this option provides a text description file
    providing paths to SP binary images and DTS format manifests
    (see `Specifying partition binary image and DT`_). It