spmi: msm: demote to debug()

Most devices have buttons exposed via the PMIC, the button polling
therefore triggers a log spam if debug logging is enabled.

Demote these to debug() so that they aren't printed unless LOG_DEBUG is
defined explicitly for this file.

Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Signed-off-by: Caleb Connolly <caleb.connolly@linaro.org>
diff --git a/drivers/spmi/spmi-msm.c b/drivers/spmi/spmi-msm.c
index b0d6226..a35cb0b 100644
--- a/drivers/spmi/spmi-msm.c
+++ b/drivers/spmi/spmi-msm.c
@@ -119,7 +119,7 @@
 
 	channel = priv->channel_map[usid][pid] & SPMI_CHANNEL_MASK;
 
-	dev_dbg(dev, "[%d:%d] %s: channel %d\n", usid, pid, __func__, channel);
+	debug("%s: [%d:%d] %s: channel %d\n", dev->name, usid, pid, __func__, channel);
 
 	switch (priv->arb_ver) {
 	case V1:
@@ -186,7 +186,7 @@
 
 	channel = priv->channel_map[usid][pid] & SPMI_CHANNEL_MASK;
 
-	dev_dbg(dev, "[%d:%d] %s: channel %d\n", usid, pid, __func__, channel);
+	debug("%s: [%d:%d] %s: channel %d\n", dev->name, usid, pid, __func__, channel);
 
 	switch (priv->arb_ver) {
 	case V1: