MIPS: loongson2ef: lemote-2f: add missing function prototypes

Add several missing function prototypes for lemote-2f to eliminate
build warnings:

arch/mips/loongson2ef/lemote-2f/machtype.c:10:13: warning: no previous prototype for 'mach_prom_init_machtype' [-Wmissing-prototypes]
   10 | void __init mach_prom_init_machtype(void)
arch/mips/loongson2ef/common/machtype.c:34:20: warning: no previous prototype for 'mach_prom_init_machtype' [-Wmissing-prototypes]
   34 | void __weak __init mach_prom_init_machtype(void)
arch/mips/loongson2ef/lemote-2f/pm.c:52:6: warning: no previous prototype for 'setup_wakeup_events' [-Wmissing-prototypes]
   52 | void setup_wakeup_events(void)
arch/mips/loongson2ef/lemote-2f/pm.c:90:5: warning: no previous prototype for 'wakeup_loongson' [-Wmissing-prototypes]
   90 | int wakeup_loongson(void)
arch/mips/loongson2ef/lemote-2f/pm.c:137:13: warning: no previous prototype for 'mach_suspend' [-Wmissing-prototypes]
  137 | void __weak mach_suspend(void)
arch/mips/loongson2ef/lemote-2f/pm.c:142:13: warning: no previous prototype for 'mach_resume' [-Wmissing-prototypes]
  142 | void __weak mach_resume(void)

Signed-off-by: Randy Dunlap <[email protected]>
Cc: Jiaxun Yang <[email protected]>
Cc: [email protected]
Cc: Thomas Bogendoerfer <[email protected]>
Signed-off-by: Thomas Bogendoerfer <[email protected]>

Author: rddunlap

arch/mips/include/asm/mach-loongson2ef/loongson.h

@@ -18,6 +18,9 @@ extern void bonito_irq_init(void);
 extern void mach_prepare_reboot(void);
 extern void mach_prepare_shutdown(void);
 
+/* machine-specific PROM functions */
+extern void __init mach_prom_init_machtype(void);
+
 /* environment arguments from bootloader */
 extern u32 cpu_clock_freq;
 extern u32 memsize, highmemsize;
@@ -45,6 +48,12 @@ extern void __init mach_init_irq(void);
 extern void mach_irq_dispatch(unsigned int pending);
 extern int mach_i8259_irq(void);
 
+/* power management functions */
+extern void setup_wakeup_events(void);
+extern int wakeup_loongson(void);
+extern void __weak mach_suspend(void);
+extern void __weak mach_resume(void);
+
 /* We need this in some places... */
 #define delay() ({		\
 	int x;				\