stm32mp1: Migrate to new interfaces

- Remove references to removed build options.
- Remove useless include to removed file.

Change-Id: I256da4135ac0a6ff80d4f211689ab4d08436206f
Tested-by: Yann Gautier <yann.gautier@st.com>
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>

plat/st/stm32mp1/platform.mk

@@ -6,9 +6,7 @@
 
 ARM_CORTEX_A7		:=	yes
 ARM_WITH_NEON		:=	yes
-LOAD_IMAGE_V2		:=	1
 BL2_AT_EL3		:=	1
-ENABLE_PLAT_COMPAT	:=	0
 USE_COHERENT_MEM	:=	0
 
 STM32_TF_VERSION	?=	0

plat/st/stm32mp1/sp_min/sp_min_setup.c

@@ -5,7 +5,6 @@
  */
 
 #include <arch_helpers.h>
-#include <arm_gic.h>
 #include <assert.h>
 #include <bl_common.h>
 #include <console.h>