charger: print last_kmsg directly using klog_write

using the macros introduced extra characters that made things align
poorly.

Change-Id: I4924134be159723b4e4ed905c4293a42358d0ff5
Signed-off-by: Dima Zavin <dima@android.com>
diff --git a/charger/charger.c b/charger/charger.c
index d3b414d..ad0aab7 100644
--- a/charger/charger.c
+++ b/charger/charger.c
@@ -224,7 +224,7 @@
 
         yoink = ptr[cnt];
         ptr[cnt] = '\0';
-        KLOG_INFO("", "%s", ptr);
+        klog_write(6, "<6>%s", ptr);
         ptr[cnt] = yoink;
 
         len -= cnt;