cpu: Turn cpu_get_phys_page_debug() into a CPUClass hook

Change breakpoint_invalidate() argument to CPUState alongside.

Since all targets now assign a softmmu-only field, we can drop helpers
cpu_class_set_{do_unassigned_access,vmsd}() and device_class_set_vmsd().

Prepares for changing cpu_memory_rw_debug() argument to CPUState.

Acked-by: Max Filippov <jcmvbkbc@gmail.com> (for xtensa)
Signed-off-by: Andreas Färber <afaerber@suse.de>
diff --git a/target-arm/helper.c b/target-arm/helper.c
index aeae024..9105ad9 100644
--- a/target-arm/helper.c
+++ b/target-arm/helper.c
@@ -2762,17 +2762,19 @@
     return 1;
 }
 
-hwaddr cpu_get_phys_page_debug(CPUARMState *env, target_ulong addr)
+hwaddr arm_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
 {
+    ARMCPU *cpu = ARM_CPU(cs);
     hwaddr phys_addr;
     target_ulong page_size;
     int prot;
     int ret;
 
-    ret = get_phys_addr(env, addr, 0, 0, &phys_addr, &prot, &page_size);
+    ret = get_phys_addr(&cpu->env, addr, 0, 0, &phys_addr, &prot, &page_size);
 
-    if (ret != 0)
+    if (ret != 0) {
         return -1;
+    }
 
     return phys_addr;
 }