Inherit m68k_bsd_nat_target from nbsd_nat_target

gdb/ChangeLog:

	* m68k-bsd-nat.c (m68k_bsd_nat_target): Inherit from
	nbsd_nat_target instead of inf_ptrace_target.
	* m68k-bsd-nat.c: Include "nbsd-nat.h", as we are now using
	nbsd_nat_target.

gdb/ChangeLog

@@ -1,3 +1,10 @@
+2020-03-14  Kamil Rytarowski  <n54@gmx.com>
+
+	* m68k-bsd-nat.c (m68k_bsd_nat_target): Inherit from
+	nbsd_nat_target instead of inf_ptrace_target.
+	* m68k-bsd-nat.c: Include "nbsd-nat.h", as we are now using
+	nbsd_nat_target.
+
 2020-03-14  Kamil Rytarowski  <n54@gmx.com>
 
 	* m68k-bsd-nat.c: Define _KERNTYPES to get the declaration of

gdb/m68k-bsd-nat.c

@@ -30,8 +30,9 @@
 
 #include "m68k-tdep.h"
 #include "inf-ptrace.h"
+#include "nbsd-nat.h"
 
-struct m68k_bsd_nat_target final : public inf_ptrace_target
+struct m68k_bsd_nat_target final : public nbsd_nat_target
 {
   void fetch_registers (struct regcache *, int) override;
   void store_registers (struct regcache *, int) override;