AArch32: Add FVP support for SP_MIN

This patch implements the support for SP_MIN in FVP. The SP_MIN platform
APIs are implemented and the required makefile support is added for FVP.

Change-Id: Id50bd6093eccbd5e38894e3fd2b20d5baeac5452
diff --git a/include/plat/arm/common/plat_arm.h b/include/plat/arm/common/plat_arm.h
index 0ffdb5c..25aab24 100644
--- a/include/plat/arm/common/plat_arm.h
+++ b/include/plat/arm/common/plat_arm.h
@@ -167,6 +167,9 @@
 /* TSP utility functions */
 void arm_tsp_early_platform_setup(void);
 
+/* SP_MIN utility functions */
+void arm_sp_min_early_platform_setup(void);
+
 /* FIP TOC validity check */
 int arm_io_is_toc_valid(void);