ARM: shmobile: sh73a0: Remove obsolete static mapping

There are no more users of the statically mapped IOMEM region on
SH-Mobile AG5.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20201117103022.2136527-8-geert+renesas@glider.be

arch/arm/mach-shmobile/setup-sh73a0.c

@@ -22,24 +22,6 @@
 #include "common.h"
 #include "sh73a0.h"
 
-static struct map_desc sh73a0_io_desc[] __initdata = {
-	/* create a 1:1 identity mapping for 0xe6xxxxxx
-	 * used by CPGA, INTC and PFC.
-	 */
-	{
-		.virtual	= 0xe6000000,
-		.pfn		= __phys_to_pfn(0xe6000000),
-		.length		= 256 << 20,
-		.type		= MT_DEVICE_NONSHARED
-	},
-};
-
-static void __init sh73a0_map_io(void)
-{
-	debug_ll_io_init();
-	iotable_init(sh73a0_io_desc, ARRAY_SIZE(sh73a0_io_desc));
-}
-
 static void __init sh73a0_generic_init(void)
 {
 #ifdef CONFIG_CACHE_L2X0
@@ -55,7 +37,6 @@ static const char *const sh73a0_boards_compat_dt[] __initconst = {
 
 DT_MACHINE_START(SH73A0_DT, "Generic SH73A0 (Flattened Device Tree)")
 	.smp		= smp_ops(sh73a0_smp_ops),
-	.map_io		= sh73a0_map_io,
 	.init_machine	= sh73a0_generic_init,
 	.init_late	= shmobile_init_late,
 	.dt_compat	= sh73a0_boards_compat_dt,