powerpc/chrp/time: Make some functions static, add missing header include

Add a missing include <platforms/chrp/chrp.h>.

These functions can all be static, make it so. Fix warnings treated as
errors with W=1:

  arch/powerpc/platforms/chrp/time.c:41:13: error: no previous prototype for ‘chrp_time_init’ [-Werror=missing-prototypes]
  arch/powerpc/platforms/chrp/time.c:66:5: error: no previous prototype for ‘chrp_cmos_clock_read’ [-Werror=missing-prototypes]
  arch/powerpc/platforms/chrp/time.c:74:6: error: no previous prototype for ‘chrp_cmos_clock_write’ [-Werror=missing-prototypes]
  arch/powerpc/platforms/chrp/time.c:86:5: error: no previous prototype for ‘chrp_set_rtc_time’ [-Werror=missing-prototypes]
  arch/powerpc/platforms/chrp/time.c:130:6: error: no previous prototype for ‘chrp_get_rtc_time’ [-Werror=missing-prototypes]

Signed-off-by: Mathieu Malaterre <malat@debian.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/platforms/chrp/time.c

@@ -28,6 +28,8 @@
 #include <asm/sections.h>
 #include <asm/time.h>
 
+#include <platforms/chrp/chrp.h>
+
 extern spinlock_t rtc_lock;
 
 #define NVRAM_AS0  0x74
@@ -63,7 +65,7 @@ long __init chrp_time_init(void)
 	return 0;
 }
 
-int chrp_cmos_clock_read(int addr)
+static int chrp_cmos_clock_read(int addr)
 {
 	if (nvram_as1 != 0)
 		outb(addr>>8, nvram_as1);
@@ -71,7 +73,7 @@ int chrp_cmos_clock_read(int addr)
 	return (inb(nvram_data));
 }
 
-void chrp_cmos_clock_write(unsigned long val, int addr)
+static void chrp_cmos_clock_write(unsigned long val, int addr)
 {
 	if (nvram_as1 != 0)
 		outb(addr>>8, nvram_as1);