hw/timer/grlib_gptimer: remove unnecessary assignment

Signed-off-by: Prasad Joshi <prasadjoshi.linux@gmail.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

hw/timer/grlib_gptimer.c

diff --git a/hw/timer/grlib_gptimer.c b/hw/timer/grlib_gptimer.c
index 7672d3a..d655bb2 100644
--- a/hw/timer/grlib_gptimer.c
+++ b/hw/timer/grlib_gptimer.c
@@ -328,7 +328,6 @@
 
     unit->scaler = 0;
     unit->reload = 0;
-    unit->config = 0;
 
     unit->config  = unit->nr_timers;
     unit->config |= unit->irq_line << 3;