kvm: Change kvm_{insert,remove}_breakpoint() argument to CPUState

CPUArchState is no longer directly used since converting CPU loops to
CPUState.

Prepares for changing GDBState::c_cpu to CPUState.

Signed-off-by: Andreas Färber <afaerber@suse.de>
diff --git a/gdbstub.c b/gdbstub.c
index 8e23509..b5e6778 100644
--- a/gdbstub.c
+++ b/gdbstub.c
@@ -1954,8 +1954,10 @@
     CPUArchState *env;
     int err = 0;
 
-    if (kvm_enabled())
-        return kvm_insert_breakpoint(gdbserver_state->c_cpu, addr, len, type);
+    if (kvm_enabled()) {
+        return kvm_insert_breakpoint(ENV_GET_CPU(gdbserver_state->c_cpu),
+                                     addr, len, type);
+    }
 
     switch (type) {
     case GDB_BREAKPOINT_SW:
@@ -1991,8 +1993,10 @@
     CPUArchState *env;
     int err = 0;
 
-    if (kvm_enabled())
-        return kvm_remove_breakpoint(gdbserver_state->c_cpu, addr, len, type);
+    if (kvm_enabled()) {
+        return kvm_remove_breakpoint(ENV_GET_CPU(gdbserver_state->c_cpu),
+                                     addr, len, type);
+    }
 
     switch (type) {
     case GDB_BREAKPOINT_SW: