softpll-unify: other trivial changes (no effect on rt_cpu.bin)

The commit is part of the effort in unifying softpll with wrpc-sw,
and later remove the duplicated code here in wr-switch-sw.

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

rt/softpll/spll_common.c

@@ -9,7 +9,7 @@
 
 /* spll_common.c - common data structures and functions used by the SoftPLL */
 
-
+#include <string.h>
 #include "spll_defs.h"
 #include "spll_common.h"
 

rt/softpll/spll_helper.c

@@ -35,7 +35,6 @@ void helper_init(struct spll_helper_state *s, int ref_channel)
 	s->ld.delock_samples = 100;
 	s->ref_src = ref_channel;
 	s->delock_count = 0;
-
 }
 
 int helper_update(struct spll_helper_state *s, int tag,
@@ -108,5 +107,4 @@ void helper_start(struct spll_helper_state *s)
 
 	spll_enable_tagger(s->ref_src, 1);
 	spll_debug(DBG_EVENT | DBG_HELPER, DBG_EVT_START, 1);
-
 }