baylibre-acme: Move enum channel_type to protocol.c.

This enum is private and only used within protocol.c. Don't expose it
in protocol.h.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>

src/hardware/baylibre-acme/protocol.c

@@ -26,6 +26,14 @@
 #include "protocol.h"
 #include "gpio.h"
 
+enum channel_type {
+	ENRG_PWR = 1,
+	ENRG_CURR,
+	ENRG_VOL,
+	TEMP_IN,
+	TEMP_OUT,
+};
+
 struct channel_group_priv {
 	int hwmon_num;
 	int probe_type;

src/hardware/baylibre-acme/protocol.h

@@ -49,14 +49,6 @@ enum probe_type {
 	PROBE_TEMP,
 };
 
-enum channel_type {
-	ENRG_PWR = 1,
-	ENRG_CURR,
-	ENRG_VOL,
-	TEMP_IN,
-	TEMP_OUT,
-};
-
 /** Private, per-device-instance driver context. */
 struct dev_context {
 	uint64_t samplerate;