arch/x86/kernel/resource.c: needs spinlock.h

arch/x86/kernel/resource.c: needs spinlock.h

fix recent breaking in -next.  x86_64 allnoconfig.

In file included from arch/x86/kernel/resource.c:4:
./arch/x86/include/asm/pci_x86.h:105:8: error: unknown type name 'raw_spinlock_t'
  105 | extern raw_spinlock_t pci_config_lock;
      |        ^~~~~~~~~~~~~~

am too lazy to hunt down the offending commit.

Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>