arch: arc: Remove CONFIG_OPROFILE support

The "oprofile" user-space tools don't use the kernel OPROFILE support
any more, and haven't in a long time. User-space has been converted to
the perf interfaces.

Remove the old oprofile's architecture specific support.
Suggested-by: Christoph Hellwig <hch@infradead.org>
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Robert Richter <rric@kernel.org>
Acked-by: Vineet Gupta <vgupta@synopsys.com>
Acked-by: William Cohen <wcohen@redhat.com>
Acked-by: Al Viro <viro@zeniv.linux.org.uk>
Acked-by: Thomas Gleixner <tglx@linutronix.de>

arch/arc/Kconfig

@@ -37,7 +37,6 @@ config ARC
 	select HAVE_KPROBES
 	select HAVE_KRETPROBES
 	select HAVE_MOD_ARCH_SPECIFIC
-	select HAVE_OPROFILE
 	select HAVE_PERF_EVENTS
 	select HANDLE_DOMAIN_IRQ
 	select IRQ_DOMAIN

arch/arc/Makefile

@@ -96,8 +96,6 @@ core-$(CONFIG_ARC_PLAT_TB10X)	+= arch/arc/plat-tb10x/
 core-$(CONFIG_ARC_PLAT_AXS10X)	+= arch/arc/plat-axs10x/
 core-$(CONFIG_ARC_SOC_HSDK)	+= arch/arc/plat-hsdk/
 
-drivers-$(CONFIG_OPROFILE)	+= arch/arc/oprofile/
-
 libs-y		+= arch/arc/lib/ $(LIBGCC)
 
 boot		:= arch/arc/boot

arch/arc/oprofile/Makefile

-# SPDX-License-Identifier: GPL-2.0
-obj-$(CONFIG_OPROFILE) += oprofile.o
-
-DRIVER_OBJS = $(addprefix ../../../drivers/oprofile/, \
-		oprof.o cpu_buffer.o buffer_sync.o \
-		event_buffer.o oprofile_files.o \
-		oprofilefs.o oprofile_stats.o \
-		timer_int.o )
-
-oprofile-y	:= $(DRIVER_OBJS) common.o

arch/arc/oprofile/common.c

-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
- *
- * Based on orig code from @author John Levon <levon@movementarian.org>
- */
-
-#include <linux/oprofile.h>
-#include <linux/perf_event.h>
-
-int __init oprofile_arch_init(struct oprofile_operations *ops)
-{
-	/*
-	 * A failure here, forces oprofile core to switch to Timer based PC
-	 * sampling, which will happen if say perf is not enabled/available
-	 */
-	return oprofile_perf_init(ops);
-}
-
-void oprofile_arch_exit(void)
-{
-	oprofile_perf_exit();
-}