feat(docs): add STM32MP2 docs links

Add links to official STMicroelectronics documentation (STM32MP2
series presentation and wiki).

Signed-off-by: Yann Gautier <yann.gautier@foss.st.com>
Change-Id: I2fca0da56bc6064c222df34493921dff3e119a22
diff --git a/docs/plat/st/stm32mp2.rst b/docs/plat/st/stm32mp2.rst
index 6bd1af7..5d4ab4e 100644
--- a/docs/plat/st/stm32mp2.rst
+++ b/docs/plat/st/stm32mp2.rst
@@ -4,6 +4,8 @@
 STM32MP2 is a microprocessor designed by STMicroelectronics
 based on Arm Cortex-A35.
 
+More information can be found on `STM32MP2 Series`_ page.
+
 For TF-A common configuration of STM32 MPUs, please check
 :ref:`STM32 MPUs` page.
 
@@ -24,6 +26,8 @@
 - D      Basic + Cortex-A35 @ 1.5GHz
 - F      Secure Boot + HW Crypto + Cortex-A35 @ 1.5GHz
 
+The `STM32MP2 part number codification`_ page gives more information about part numbers.
+
 Memory mapping
 --------------
 
@@ -130,4 +134,7 @@
         BL32_EXTRA1=<optee_directory>/tee-pager_v2.bin
         fip
 
+.. _STM32MP2 Series: https://www.st.com/en/microcontrollers-microprocessors/stm32mp2-series.html
+.. _STM32MP2 part number codification: https://wiki.st.com/stm32mpu/wiki/STM32MP25_microprocessor#Part_number_codification
+
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