refactor(st): move board info in common code

Create a function stm32_display_board_info() that will display ST
board information, from a parameter taken from OTP fuse. The code
is just moved from STM32MP1 part to common directory.

Signed-off-by: Yann Gautier <yann.gautier@st.com>
Change-Id: I9e12fe98b5aabc7791cf2c9d48a38fbf2b219f9e
diff --git a/plat/st/common/include/stm32mp_common.h b/plat/st/common/include/stm32mp_common.h
index 1d592bd..bb3401f 100644
--- a/plat/st/common/include/stm32mp_common.h
+++ b/plat/st/common/include/stm32mp_common.h
@@ -123,6 +123,9 @@
 /* Function to get BOOT_MODE backup register address */
 uintptr_t stm32_get_bkpr_boot_mode_addr(void);
 
+/* Display board information from the value found in OTP fuse */
+void stm32_display_board_info(uint32_t board_id);
+
 #if PSA_FWU_SUPPORT
 void stm32mp1_fwu_set_boot_idx(void);
 uint32_t stm32_get_and_dec_fwu_trial_boot_cnt(void);