The function prototypes were declared within a `#ifdef CONFIG_PPC_LITE5200`
block which would prevent them from being visible when compiling
`mpc52xx_pm.c`. Move the prototypes outside of the `#ifdef` block to fix
the following warnings treated as errors with W=1:

   arch/powerpc/platforms/52xx/mpc52xx_pm.c:58:5: error: no previous prototype for ‘mpc52xx_pm_prepare’ [-Werror=missing-prototypes]
   arch/powerpc/platforms/52xx/mpc52xx_pm.c:113:5: error: no previous prototype for ‘mpc52xx_pm_enter’ [-Werror=missing-prototypes]
   arch/powerpc/platforms/52xx/mpc52xx_pm.c:181:6: error: no previous prototype for ‘mpc52xx_pm_finish’ [-Werror=missing-prototypes]

Signed-off-by: Mathieu Malaterre <redacted>
---
  arch/powerpc/include/asm/mpc52xx.h | 6 +++---
  1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/powerpc/include/asm/mpc52xx.h b/arch/powerpc/include/asm/mpc52xx.h
index e94cede14522..0f6b3cbb119f 100644
--- a/arch/powerpc/include/asm/mpc52xx.h
+++ b/arch/powerpc/include/asm/mpc52xx.h

@@ -350,14 +350,14 @@ extern struct mpc52xx_suspend mpc52xx_suspend;
  extern int __init mpc52xx_pm_init(void);
  extern int mpc52xx_set_wakeup_gpio(u8 pin, u8 level);
  
-#ifdef CONFIG_PPC_LITE5200
-extern int __init lite5200_pm_init(void);
-
  /* lite5200 calls mpc5200 suspend functions, so here they are */
  extern int mpc52xx_pm_prepare(void);
  extern int mpc52xx_pm_enter(suspend_state_t);
  extern void mpc52xx_pm_finish(void);
  extern char saved_sram[0x4000]; /* reuse buffer from mpc52xx suspend */
+
+#ifdef CONFIG_PPC_LITE5200
+extern int __init lite5200_pm_init(void);