cpu-exec: Do CPU_INTERRUPT_HALT unconditionally

The signal is currently checked by 10 targets, but only actually
raised by Sparc and ARM.  For the sake of one test-and-branch,
we can handle this generic bit generically.
Signed-off-by: NRichard Henderson <rth@twiddle.net>
Message-id: 1410626734-3804-24-git-send-email-rth@twiddle.net
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

cpu-exec.c

@@ -404,17 +404,12 @@ int cpu_exec(CPUArchState *env)
                         cpu->exception_index = EXCP_DEBUG;
                         cpu_loop_exit(cpu);
                     }
-#if defined(TARGET_ARM) || defined(TARGET_SPARC) || defined(TARGET_MIPS) || \
-    defined(TARGET_PPC) || defined(TARGET_ALPHA) || defined(TARGET_CRIS) || \
-    defined(TARGET_MICROBLAZE) || defined(TARGET_LM32) ||                   \
-    defined(TARGET_UNICORE32) || defined(TARGET_TRICORE)
                     if (interrupt_request & CPU_INTERRUPT_HALT) {
                         cpu->interrupt_request &= ~CPU_INTERRUPT_HALT;
                         cpu->halted = 1;
                         cpu->exception_index = EXCP_HLT;
                         cpu_loop_exit(cpu);
                     }
-#endif
 #if defined(TARGET_I386)
                     if (interrupt_request & CPU_INTERRUPT_INIT) {
                         cpu_svm_check_intercept_param(env, SVM_EXIT_INIT, 0);