refactor(st-pmic): split initialize_pmic()

print_pmic_info_and_debug() prints the PMIC version ID and displays
regulator information if debug is enabled.
It is under DEBUG flag and called after initialize_pmic() in BL2.

Change-Id: Ib81a625740b7ec6abb49cfca05e44c69efaa4718
Signed-off-by: Nicolas Le Bayon <nicolas.le.bayon@st.com>
diff --git a/plat/st/stm32mp1/bl2_plat_setup.c b/plat/st/stm32mp1/bl2_plat_setup.c
index 2b87833..157efec 100644
--- a/plat/st/stm32mp1/bl2_plat_setup.c
+++ b/plat/st/stm32mp1/bl2_plat_setup.c
@@ -273,6 +273,7 @@
 skip_console_init:
 	if (dt_pmic_status() > 0) {
 		initialize_pmic();
+		print_pmic_info_and_debug();
 	}
 
 	stm32mp1_syscfg_init();