feat(stm32mp1): add regulator framework compilation

Add required macro PLAT_NB_RDEVS in platform code, and update
platform.mk to compile regulator framework.

Change-Id: I9dc7a0a4c4f5a23d9bedda368d407612c9cd21cd
Signed-off-by: Pascal Paillet <p.paillet@st.com>
Signed-off-by: Yann Gautier <yann.gautier@foss.st.com>

plat/st/stm32mp1/platform.mk

@@ -200,6 +200,7 @@ PLAT_BL_COMMON_SOURCES	+=	drivers/arm/tzc/tzc400.c				\
 				drivers/st/iwdg/stm32_iwdg.c				\
 				drivers/st/pmic/stm32mp_pmic.c				\
 				drivers/st/pmic/stpmic1.c				\
+				drivers/st/regulator/regulator_core.c			\
 				drivers/st/reset/stm32mp1_reset.c			\
 				plat/st/common/stm32mp_dt.c				\
 				plat/st/stm32mp1/stm32mp1_dbgmcu.c			\

plat/st/stm32mp1/stm32mp1_def.h

@@ -460,6 +460,12 @@ static inline uint32_t tamp_bkpr(uint32_t idx)
 #define STGEN_BASE			U(0x5c008000)
 #define SYSCFG_BASE			U(0x50020000)
 
+/*******************************************************************************
+ * REGULATORS
+ ******************************************************************************/
+/* 3 PWR + 1 VREFBUF + 14 PMIC regulators + 1 FIXED */
+#define PLAT_NB_RDEVS			U(19)
+
 /*******************************************************************************
  * Device Tree defines
  ******************************************************************************/