patch 8.1.1736: viminfo support is spread out

Problem:    Viminfo support is spread out.
Solution:   Move more viminfo code to viminfo.c. (Yegappan Lakshmanan,
            closes #4717)  Reorder code to make most functions static.
diff --git a/src/proto/ops.pro b/src/proto/ops.pro
index 0ff27a2..ed5877d 100644
--- a/src/proto/ops.pro
+++ b/src/proto/ops.pro
@@ -1,4 +1,8 @@
 /* ops.c */
+yankreg_T *get_y_regs(void);
+yankreg_T *get_y_current(void);
+yankreg_T *get_y_previous(void);
+void set_y_previous(yankreg_T *yreg);
 int get_op_type(int char1, int char2);
 int op_on_lines(int op);
 int op_is_change(int op);
@@ -19,6 +23,8 @@
 void free_register(void *reg);
 int yank_register_mline(int regname);
 int do_record(int c);
+int get_execreg_lastc(void);
+void set_execreg_lastc(int lastc);
 int do_execreg(int regname, int colon, int addcr, int silent);
 int insert_reg(int regname, int literally_arg);
 int get_spec_reg(int regname, char_u **argp, int *allocated, int errmsg);
@@ -47,11 +53,6 @@
 void format_lines(linenr_T line_count, int avoid_fex);
 int paragraph_start(linenr_T lnum);
 void op_addsub(oparg_T *oap, linenr_T Prenum1, int g_cmd);
-void prepare_viminfo_registers(void);
-void finish_viminfo_registers(void);
-int read_viminfo_register(vir_T *virp, int force);
-void handle_viminfo_register(garray_T *values, int force);
-void write_viminfo_registers(FILE *fp);
 void x11_export_final_selection(void);
 void clip_free_selection(Clipboard_T *cbd);
 void clip_get_selection(Clipboard_T *cbd);