net: drop NET dependency from HAVE_BPF_JIT

There is no point having the NET dependency on the select target, as it
forces all users to depend on NET to tell they support BPF_JIT. Move
the config option to the bottom of the file - this could be a nice place
also for future "selectable" config symbols.

Fix up all users to drop the dependency on NET now that it is not
required to supress warnings for non-NET builds.

Reported-by: Linus Torvalds <[e-mail]>
Signed-off-by: Sam Ravnborg <[e-mail]>
Acked-by: David Miller <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

arch/arm/Kconfig

···
 	select GENERIC_IRQ_SHOW
 	select CPU_PM if (SUSPEND || CPU_IDLE)
 	select GENERIC_PCI_IOMAP
-	select HAVE_BPF_JIT if NET
+	select HAVE_BPF_JIT
 	help
 	  The ARM series is a line of low-power-consumption RISC chip designs
 	  licensed by ARM Ltd and targeted at embedded applications and

arch/powerpc/Kconfig

···
 	select IRQ_FORCED_THREADING
 	select HAVE_RCU_TABLE_FREE if SMP
 	select HAVE_SYSCALL_TRACEPOINTS
-	select HAVE_BPF_JIT if (PPC64 && NET)
+	select HAVE_BPF_JIT if PPC64
 	select HAVE_ARCH_JUMP_LABEL
 	select ARCH_HAVE_NMI_SAFE_CMPXCHG
 

arch/sparc/Kconfig

···
 	select USE_GENERIC_SMP_HELPERS if SMP
 	select GENERIC_PCI_IOMAP
 	select HAVE_NMI_WATCHDOG if SPARC64
-	select HAVE_BPF_JIT if NET
+	select HAVE_BPF_JIT
 
 config SPARC32
 	def_bool !64BIT

arch/x86/Kconfig

···
 	select GENERIC_CLOCKEVENTS_MIN_ADJUST
 	select IRQ_FORCED_THREADING
 	select USE_GENERIC_SMP_HELPERS if SMP
-	select HAVE_BPF_JIT if (X86_64 && NET)
+	select HAVE_BPF_JIT if X86_64
 	select CLKEVT_I8253
 	select ARCH_HAVE_NMI_SAFE_CMPXCHG
 	select GENERIC_IOMAP

net/Kconfig

···
 	select DQL
 	default y
 
-config HAVE_BPF_JIT
-	bool
-
 config BPF_JIT
 	bool "enable BPF Just In Time compiler"
 	depends on HAVE_BPF_JIT
···
 
 
 endif   # if NET
+
+# Used by archs to tell that they support BPF_JIT
+config HAVE_BPF_JIT
+	bool