[IA64] MCA: remove obsolete ifdef

No platform in the community tree uses PLATFORM_MCA_HANDLERS, remove
the references.
Signed-off-by: Keith Owens <kaos@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

arch/ia64/kernel/mca.c

@@ -281,11 +281,6 @@ ia64_mca_log_sal_error_record(int sal_info_type)
 		ia64_sal_clear_state_info(sal_info_type);
 }
 
-/*
- * platform dependent error handling
- */
-#ifndef PLATFORM_MCA_HANDLERS
-
 #ifdef CONFIG_ACPI
 
 int cpe_vector = -1;
@@ -377,8 +372,6 @@ ia64_mca_register_cpev (int cpev)
 }
 #endif /* CONFIG_ACPI */
 
-#endif /* PLATFORM_MCA_HANDLERS */
-
 /*
  * ia64_mca_cmc_vector_setup
  *