sgi: sgm: Migrate to new interfaces

- Remove references to removed build options.
- Remove support for LOAD_IMAGE_V2=0.

Change-Id: I296385ef2ebf829446c76a54400d73f963ed265f
Tested-by: Nariman Poushin <nariman.poushin@linaro.org>
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>
diff --git a/plat/arm/css/sgm/sgm_plat_config.c b/plat/arm/css/sgm/sgm_plat_config.c
index 97b16a8..e977e61 100644
--- a/plat/arm/css/sgm/sgm_plat_config.c
+++ b/plat/arm/css/sgm/sgm_plat_config.c
@@ -68,7 +68,7 @@
 	return css_plat_info;
 }
 
-#if TRUSTED_BOARD_BOOT && LOAD_IMAGE_V2
+#if TRUSTED_BOARD_BOOT
 int plat_get_mbedtls_heap(void **heap_addr, size_t *heap_size)
 {
 	assert(heap_addr != NULL);