fix(ptp): use proper refs

Replace all relative links with proper refs. Some of these links were
already invalid. If any of these are wrong I'll leave it to the IP owner
to sort out.

Signed-off-by: Randolph Sapp <[email protected]>

Author: StaticRocket

source/linux/Industrial_Protocols/HSR_PRP/_HSR_PRP_for_Linux.rst

@@ -103,6 +103,8 @@ The driver source code is located under net/hsr-prp folder of the Linux
 source tree. To build kernel with this driver, set Kconfig option
 CONFIG\_HSR=y in the dotconfig or enable it from the menu.
 
+.. _hsr-prp-overview-and-setup:
+
 Linux HSR/PRP Driver
 ^^^^^^^^^^^^^^^^^^^^^^^^
 

source/linux/Industrial_Protocols/PTP/_PTP.rst

@@ -135,10 +135,9 @@ clock entity.
 GMAC
 ----
 
-GMAC interface can be configured to run at either 100 Mbps or 1 Gbps.
-CPTS hardware block helps with timestamping of packets. Refer to
-`here <Foundational_Components/Kernel/Kernel_Drivers/Network/CPSW.html#common-platform-time-sync-cpts>`__
-for details.
+GMAC interface can be configured to run at either 100 Mbps or 1 Gbps. CPTS
+hardware block helps with timestamping of packets. Refer to
+:ref:`common-platform-time-sync-cpts` for details.
 
 PRU-ICSS
 --------
@@ -422,11 +421,13 @@ PTP/OC in slave mode:
 
 |
 
+.. _redundancy-hsr-prp:
+
 Redundancy (HSR/PRP)
 ^^^^^^^^^^^^^^^^^^^^
 
 To set up PTP OC over HSR/PRP redundant interface, first setup HSR/PRP interface
-as detailed in `HSR/PRP Linux Software <Industrial_Protocols_HSR_PRP.html#linux-software>`__.
+as detailed in :ref:`hsr-prp-overview-and-setup`.
 
 Start PTP with the same command listed above, but using a different
 configuration file:
@@ -725,9 +726,10 @@ the same ICSS-PRU simultaneously.
 
 PTP Ordinary Clock on GMAC
 --------------------------
-Refer to `here <Foundational_Components/Kernel/Kernel_Drivers/Network/CPSW.html#common-platform-time-sync-cpts>`__
-for more details about the CPTS driver and how to run **linuxptp** over the CPSW GMAC port
-for providing the PTP OC functionality.
+
+Refer to :ref:`common-platform-time-sync-cpts` for more details about the CPTS
+driver and how to run **linuxptp** over the CPSW GMAC port for providing the PTP
+OC functionality.
 
 For example, once the AM57xx IDK is boot into Linux kernel prompt and
 the CPSW GMAC ports are properly configured, to run linuxptp over the
@@ -1848,8 +1850,8 @@ Procedure
 
 The script file :ref:`setup-hsr` and clock configuration files e.g.
 dut_1_hsr_oc.cfg, dut_2_hsr_oc.cfg, dut_3_hsr_oc.cfg (each identical, same as
-listed in `PTP Redundancy <Industrial_Protocols_PTP.html#redundancy-hsr-prp>`__
-section for HSR) will be used in the setup of the tests.
+listed in :ref:`redundancy-hsr-prp` section for HSR) will be used in the setup
+of the tests.
 
 .. code-block:: bash
    :caption: setup_hsr.sh