staging: board: Remove KZM9D board staging code

With the EMMA Mobile USB Gadget staging driver removed, there is no
longer any use for the EMEV2 KZM9D board staging code.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Acked-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Link: https://lore.kernel.org/r/f54fe56524e0266a3c705315f04870988912cfcf.1705932585.git.geert+renesas@glider.beSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/board/Makefile

 # SPDX-License-Identifier: GPL-2.0
 obj-y	:= board.o
-obj-$(CONFIG_ARCH_EMEV2)	+= kzm9d.o
 obj-$(CONFIG_ARCH_R8A7740)	+= armadillo800eva.o

drivers/staging/board/kzm9d.c

-// SPDX-License-Identifier: GPL-2.0
-/* Staging board support for KZM9D. Enable not-yet-DT-capable devices here. */
-
-#include <linux/kernel.h>
-#include <linux/platform_device.h>
-#include "board.h"
-
-static struct resource usbs1_res[] __initdata = {
-	DEFINE_RES_MEM(0xe2800000, 0x2000),
-	DEFINE_RES_IRQ(159),
-};
-
-static void __init kzm9d_init(void)
-{
-	board_staging_gic_setup_xlate("arm,pl390", 32);
-
-	if (!board_staging_dt_node_available(usbs1_res,
-					     ARRAY_SIZE(usbs1_res))) {
-		board_staging_gic_fixup_resources(usbs1_res,
-						  ARRAY_SIZE(usbs1_res));
-		platform_device_register_simple("emxx_udc", -1, usbs1_res,
-						ARRAY_SIZE(usbs1_res));
-	}
-}
-
-board_staging("renesas,kzm9d", kzm9d_init);