V4L/DVB (8322): sms1xxx: fix improper usage of asm/foo.h

Fix the following warnings generated by checkpatch.pl:

WARNING: Use #include <linux/io.h> instead of <asm/io.h>
 251: FILE: linux/drivers/media/dvb/siano/smscoreapi.c:30:
+#include <asm/io.h>

WARNING: Use #include <linux/scatterlist.h> instead of <asm/scatterlist.h>
 1566: FILE: linux/drivers/media/dvb/siano/smscoreapi.h:29:
+#include <asm/scatterlist.h>

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>