docs(stm32mp2): correct STM32MP2 frequencies

STM32MP25xA & STM32MP25xC versions run at 1.2GHz.

Signed-off-by: Nicolas Le Bayon <nicolas.le.bayon@st.com>
Change-Id: I75aea682c8e3fa89e7ac1347bb7f9d02f2086222
diff --git a/docs/plat/st/stm32mp2.rst b/docs/plat/st/stm32mp2.rst
index 43e131d..6bd1af7 100644
--- a/docs/plat/st/stm32mp2.rst
+++ b/docs/plat/st/stm32mp2.rst
@@ -19,8 +19,8 @@
 
 Each line comes with a security option (cryptography & secure boot) and a Cortex-A frequency option:
 
-- A      Basic + Cortex-A35 @ 1GHz
-- C      Secure Boot + HW Crypto + Cortex-A35 @ 1GHz
+- A      Basic + Cortex-A35 @ 1.2GHz
+- C      Secure Boot + HW Crypto + Cortex-A35 @ 1.2GHz
 - D      Basic + Cortex-A35 @ 1.5GHz
 - F      Secure Boot + HW Crypto + Cortex-A35 @ 1.5GHz
 
@@ -130,4 +130,4 @@
         BL32_EXTRA1=<optee_directory>/tee-pager_v2.bin
         fip
 
-*Copyright (c) 2023, STMicroelectronics - All Rights Reserved*
+*Copyright (c) 2023-2024, STMicroelectronics - All Rights Reserved*