hw/core: Make do_unaligned_access noreturn

While we may have had some thought of allowing system-mode
to return from this hook, we have no guests that require this.

Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

target/hppa/cpu.c

@@ -72,9 +72,10 @@ static void hppa_cpu_disas_set_info(CPUState *cs, disassemble_info *info)
 }
 
 #ifndef CONFIG_USER_ONLY
-static void hppa_cpu_do_unaligned_access(CPUState *cs, vaddr addr,
-                                         MMUAccessType access_type,
-                                         int mmu_idx, uintptr_t retaddr)
+static void QEMU_NORETURN
+hppa_cpu_do_unaligned_access(CPUState *cs, vaddr addr,
+                             MMUAccessType access_type, int mmu_idx,
+                             uintptr_t retaddr)
 {
     HPPACPU *cpu = HPPA_CPU(cs);
     CPUHPPAState *env = &cpu->env;