Convert arm_setup_page_tables into a generic helper

This function is not related to Arm platforms and can be reused by other
platforms if needed.

Change-Id: Ia9c328ce57ce7e917b825a9e09a42b0abb1a53e8
Co-authored-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>
diff --git a/plat/arm/common/tsp/arm_tsp_setup.c b/plat/arm/common/tsp/arm_tsp_setup.c
index 2d42d8e..3cf8825 100644
--- a/plat/arm/common/tsp/arm_tsp_setup.c
+++ b/plat/arm/common/tsp/arm_tsp_setup.c
@@ -85,6 +85,6 @@
 		{0}
 	};
 
-	arm_setup_page_tables(bl_regions, plat_arm_get_mmap());
+	setup_page_tables(bl_regions, plat_arm_get_mmap());
 	enable_mmu_el1(0);
 }