[PATCH 4/9] cpuidle-haltpoll: define arch_haltpoll_supported()

[kernel test robot]

Hi Ankur,

kernel test robot noticed the following build errors:

[auto build test ERROR on rafael-pm/linux-next]
[also build test ERROR on rafael-pm/bleeding-edge tip/x86/core arm64/for-next/core linus/master v6.9-rc6 next-20240430]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Ankur-Arora/cpuidle-rename-ARCH_HAS_CPU_RELAX-to-ARCH_HAS_OPTIMIZED_POLL/20240501-024252
base:   https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git linux-next
patch link:    https://lore.kernel.org/r/20240430183730.561960-5-ankur.a.arora%40oracle.com
patch subject: [PATCH 4/9] cpuidle-haltpoll: define arch_haltpoll_supported()
config: i386-buildonly-randconfig-001-20240501 (https://download.01.org/0day-ci/archive/20240501/202405011942.NBEU9bJO-lkp@intel.com/config)
compiler: clang version 18.1.4 (https://github.com/llvm/llvm-project e6c3289804a67ea0bb6a86fadbe454dd93b8d855)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240501/202405011942.NBEU9bJO-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp at intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202405011942.NBEU9bJO-lkp@intel.com/

All errors (new ones prefixed by >>):

>> ld.lld: error: undefined symbol: arch_haltpoll_enable
   >>> referenced by cpuidle-haltpoll.c
   >>>               drivers/cpuidle/cpuidle-haltpoll.o:(haltpoll_cpu_online) in archive vmlinux.a
--
>> ld.lld: error: undefined symbol: arch_haltpoll_disable
   >>> referenced by cpuidle-haltpoll.c
   >>>               drivers/cpuidle/cpuidle-haltpoll.o:(haltpoll_cpu_offline) in archive vmlinux.a
--
>> ld.lld: error: undefined symbol: arch_haltpoll_supported
   >>> referenced by cpuidle-haltpoll.c
   >>>               drivers/cpuidle/cpuidle-haltpoll.o:(haltpoll_init) in archive vmlinux.a

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