Blackfin arch: add support for checking/clearing overruns in generic purpose Timer API

Signed-off-by: Mike Frysinger <michael.frysinger@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>

diff --git a/include/asm-blackfin/gptimers.h b/include/asm-blackfin/gptimers.h
index c97ab03..8265ea4 100644
--- a/include/asm-blackfin/gptimers.h
+++ b/include/asm-blackfin/gptimers.h
@@ -197,6 +197,8 @@
 uint32_t get_gptimer_count     (int timer_id);
 uint16_t get_gptimer_intr      (int timer_id);
 void     clear_gptimer_intr    (int timer_id);
+uint16_t get_gptimer_over      (int timer_id);
+void     clear_gptimer_over    (int timer_id);
 void     set_gptimer_config    (int timer_id, uint16_t config);
 uint16_t get_gptimer_config    (int timer_id);
 void     set_gptimer_pulse_hi  (int timer_id);