AT91 Fix: return value of get_tbclk

 * Fix: return value of get_tbclk
 * this fixes issue with prematurely restart/retry, if BOOT_RETRY_TIMEOUT is used

Signed-off-by: Jens Scharsig <js_at_ng@scharsoft.de>

arch/arm/cpu/arm926ejs/at91/timer.c

diff --git a/arch/arm/cpu/arm926ejs/at91/timer.c b/arch/arm/cpu/arm926ejs/at91/timer.c
index d21eebf..8efc34b 100644
--- a/arch/arm/cpu/arm926ejs/at91/timer.c
+++ b/arch/arm/cpu/arm926ejs/at91/timer.c
@@ -138,8 +138,5 @@
  */
 ulong get_tbclk(void)
 {
-	ulong tbclk;
-
-	tbclk = CONFIG_SYS_HZ;
-	return tbclk;
+	return timer_freq;
 }