ARM: bcm: Drop unused includes

Several includes are not needed, so drop them.

of_platform.h is not needed, but it implicitly includes of.h which is
needed.

Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20230717225704.3215469-1-robh@kernel.org
Signed-off-by: Florian Fainelli <florian.fainelli@broadcom.com>

arch/arm/mach-bcm/bcm_5301x.c

@@ -5,8 +5,6 @@
  *
  * Licensed under the GNU/GPL. See COPYING for details.
  */
-#include <linux/of_platform.h>
-#include <asm/hardware/cache-l2x0.h>
 
 #include <asm/mach/arch.h>
 #include <asm/siginfo.h>

arch/arm/mach-bcm/board_bcm23550.c

@@ -1,8 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0-only
 // Copyright (C) 2016 Broadcom
 
-#include <linux/of_platform.h>
-
 #include <asm/mach/arch.h>
 
 static const char * const bcm23550_dt_compat[] = {

arch/arm/mach-bcm/brcmstb.c

@@ -3,7 +3,6 @@
 
 #include <linux/init.h>
 #include <linux/irqchip.h>
-#include <linux/of_platform.h>
 
 #include <asm/mach-types.h>
 #include <asm/mach/arch.h>

arch/arm/mach-bcm/platsmp-brcmstb.c

@@ -10,8 +10,8 @@
 #include <linux/init.h>
 #include <linux/io.h>
 #include <linux/jiffies.h>
+#include <linux/of.h>
 #include <linux/of_address.h>
-#include <linux/of_platform.h>
 #include <linux/printk.h>
 #include <linux/regmap.h>
 #include <linux/smp.h>