refactor(imx8mm): make use of setup_page_tables()

No functional change. Use the setup_page_tables() helper function which
does the three calls for us. Also the function has some logging support
which will be nice during debugging.

Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
Change-Id: Ic465491ff5468e812e805de56be3b6b92d245080
diff --git a/plat/imx/imx8m/imx8mm/imx8mm_bl31_setup.c b/plat/imx/imx8m/imx8mm/imx8mm_bl31_setup.c
index 721661e..13a4fa6 100644
--- a/plat/imx/imx8m/imx8mm/imx8mm_bl31_setup.c
+++ b/plat/imx/imx8m/imx8mm/imx8mm_bl31_setup.c
@@ -197,11 +197,7 @@
 		{0}
 	};
 
-	mmap_add(bl_regions);
-	mmap_add(imx_mmap);
-
-	init_xlat_tables();
-
+	setup_page_tables(bl_regions, imx_mmap);
 	enable_mmu_el3(0);
 }