doc: board: ti: j721e_evm: Use board relative path for include directives

When using include directives within a section that is included by non
TI board rst file, k3.rst and other include paths need to be relative to
doc/board/ base.

Signed-off-by: Nishanth Menon <nm@ti.com>
diff --git a/doc/board/ti/j721e_evm.rst b/doc/board/ti/j721e_evm.rst
index 113475d..a422a9b 100644
--- a/doc/board/ti/j721e_evm.rst
+++ b/doc/board/ti/j721e_evm.rst
@@ -48,7 +48,7 @@
 Sources:
 --------
 
-.. include::  k3.rst
+.. include::  ../ti/k3.rst
     :start-after: .. k3_rst_include_start_boot_sources
     :end-before: .. k3_rst_include_end_boot_sources
 
@@ -56,17 +56,17 @@
 ----------------
 0. Setup the environment variables:
 
-.. include::  k3.rst
+.. include::  ../ti/k3.rst
     :start-after: .. k3_rst_include_start_common_env_vars_desc
     :end-before: .. k3_rst_include_end_common_env_vars_desc
 
-.. include::  k3.rst
+.. include::  ../ti/k3.rst
     :start-after: .. k3_rst_include_start_board_env_vars_desc
     :end-before: .. k3_rst_include_end_board_env_vars_desc
 
 Set the variables corresponding to this platform:
 
-.. include::  k3.rst
+.. include::  ../ti/k3.rst
     :start-after: .. k3_rst_include_start_common_env_vars_defn
     :end-before: .. k3_rst_include_end_common_env_vars_defn
 .. prompt:: bash $
@@ -84,14 +84,14 @@
 
 1. Trusted Firmware-A:
 
-.. include::  k3.rst
+.. include::  ../ti/k3.rst
     :start-after: .. k3_rst_include_start_build_steps_tfa
     :end-before: .. k3_rst_include_end_build_steps_tfa
 
 
 2. OP-TEE:
 
-.. include::  k3.rst
+.. include::  ../ti/k3.rst
     :start-after: .. k3_rst_include_start_build_steps_optee
     :end-before: .. k3_rst_include_end_build_steps_optee
 
@@ -99,13 +99,13 @@
 
 * 3.1 R5:
 
-.. include::  k3.rst
+.. include::  ../ti/k3.rst
     :start-after: .. k3_rst_include_start_build_steps_spl_r5
     :end-before: .. k3_rst_include_end_build_steps_spl_r5
 
 * 3.2 A72:
 
-.. include::  k3.rst
+.. include::  ../ti/k3.rst
     :start-after: .. k3_rst_include_start_build_steps_uboot
     :end-before: .. k3_rst_include_end_build_steps_uboot
 .. j721e_evm_rst_include_end_build_steps
@@ -249,7 +249,7 @@
   environment's distribution needs to be updated, it might be necessary to
   build OpenOCD from the source.
 
-.. include::  k3.rst
+.. include::  ../ti/k3.rst
     :start-after: .. k3_rst_include_start_openocd_connect_XDS110
     :end-before: .. k3_rst_include_end_openocd_connect_XDS110