feat(stm32mp1): call pmic_voltages_init() in platform init

The nominal voltage for VDDCPU when Cortex-A7 runs at 650MHz is 1.25V
on STM32MP13. VDDCORE should be set at 1.25V as well.
This is necessary, as the PMIC values in its NVMEM are 1.2V.

Signed-off-by: Yann Gautier <yann.gautier@st.com>
Change-Id: I3c24fe4cd68c7bf143cf9318ab38a15d6d41b5d2
diff --git a/plat/st/stm32mp1/bl2_plat_setup.c b/plat/st/stm32mp1/bl2_plat_setup.c
index 20356e4..88d0f8a 100644
--- a/plat/st/stm32mp1/bl2_plat_setup.c
+++ b/plat/st/stm32mp1/bl2_plat_setup.c
@@ -348,6 +348,10 @@
 
 	if (dt_pmic_status() > 0) {
 		initialize_pmic();
+		if (pmic_voltages_init() != 0) {
+			ERROR("PMIC voltages init failed\n");
+			panic();
+		}
 		print_pmic_info_and_debug();
 	}