microblaze: fix build failure due to undefined reference to `get_ticks'

From: Stephan Linz <[email protected]>

after http://patchwork.ozlabs.org/patch/136415/ was applied. The Microblaze generic build fails with below error

common/libcommon.o: In function `cread_line':
/devel/u-boot/common/main.c:717: undefined reference to get_ticks' /devel/u-boot/common/main.c:717: undefined reference to get_tbclk' /devel/u-boot/common/main.c:720: undefined reference to `get_ticks'

Signed-off-by Stephan Linz <[email protected]>

---
 arch/microblaze/cpu/timer.c |   18 ++++++++++++++++++
 1 files changed, 18 insertions(+), 0 deletions(-)

arch/microblaze/cpu/timer.c +18 -0

index a167755..1952804 100644
@@ -62,3 +62,21 @@ int timer_init (void)
 }
 #endif
 #endif
+
+/*
+ * This function is derived from PowerPC code (read timebase as long long).
+ * On Microblaze it just returns the timer value.
+ */
+unsigned long long get_ticks(void)
+{
+	return get_timer(0);
+}
+
+/*
+ * This function is derived from PowerPC code (timebase clock frequency).
+ * On Microblaze it returns the number of timer ticks per second.
+ */
+ulong get_tbclk(void)
+{
+	return CONFIG_SYS_HZ;
+}