wl1271: fix sparse warnings about undeclared functions

The following sparse warnings were fixed:

drivers/net/wireless/wl12xx/wl1271_spi.c:199:6: warning: symbol 'wl1271_spi_read_busy' was not declared. Should it be static?
drivers/net/wireless/wl12xx/wl1271_cmd.c:84:5: warning: symbol 'wl1271_cmd_cal_channel_tune' was not declared. Should it be static?
drivers/net/wireless/wl12xx/wl1271_cmd.c:107:5: warning: symbol 'wl1271_cmd_cal_update_ref_point' was not declared. Should it be static?
drivers/net/wireless/wl12xx/wl1271_cmd.c:132:5: warning: symbol 'wl1271_cmd_cal_p2g' was not declared. Should it be static?
drivers/net/wireless/wl12xx/wl1271_cmd.c:153:5: warning: symbol 'wl1271_cmd_cal' was not declared. Should it be static?

Reported-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Luciano Coelho <luciano.coelho@nokia.com>
Reviewed-by: Juuso Oikarinen <juuso.oikarinen@nokia.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/wl12xx/wl1271_cmd.c

@@ -81,7 +81,7 @@ out:
 	return ret;
 }
 
-int wl1271_cmd_cal_channel_tune(struct wl1271 *wl)
+static int wl1271_cmd_cal_channel_tune(struct wl1271 *wl)
 {
 	struct wl1271_cmd_cal_channel_tune *cmd;
 	int ret = 0;
@@ -104,7 +104,7 @@ int wl1271_cmd_cal_channel_tune(struct wl1271 *wl)
 	return ret;
 }
 
-int wl1271_cmd_cal_update_ref_point(struct wl1271 *wl)
+static int wl1271_cmd_cal_update_ref_point(struct wl1271 *wl)
 {
 	struct wl1271_cmd_cal_update_ref_point *cmd;
 	int ret = 0;
@@ -129,7 +129,7 @@ int wl1271_cmd_cal_update_ref_point(struct wl1271 *wl)
 	return ret;
 }
 
-int wl1271_cmd_cal_p2g(struct wl1271 *wl)
+static int wl1271_cmd_cal_p2g(struct wl1271 *wl)
 {
 	struct wl1271_cmd_cal_p2g *cmd;
 	int ret = 0;
@@ -150,7 +150,7 @@ int wl1271_cmd_cal_p2g(struct wl1271 *wl)
 	return ret;
 }
 
-int wl1271_cmd_cal(struct wl1271 *wl)
+static int wl1271_cmd_cal(struct wl1271 *wl)
 {
 	/*
 	 * FIXME: we must make sure that we're not sleeping when calibration

drivers/net/wireless/wl12xx/wl1271_spi.c

@@ -196,7 +196,9 @@ int wl1271_set_partition(struct wl1271 *wl,
 
 #define WL1271_BUSY_WORD_TIMEOUT 1000
 
-void wl1271_spi_read_busy(struct wl1271 *wl, void *buf, size_t len)
+/* FIXME: Check busy words, removed due to SPI bug */
+#if 0
+static void wl1271_spi_read_busy(struct wl1271 *wl, void *buf, size_t len)
 {
 	struct spi_transfer t[1];
 	struct spi_message m;
@@ -256,6 +258,7 @@ void wl1271_spi_read_busy(struct wl1271 *wl, void *buf, size_t len)
 	memset(buf, 0, len);
 	wl1271_error("SPI read busy-word timeout!\n");
 }
+#endif
 
 void wl1271_spi_raw_read(struct wl1271 *wl, int addr, void *buf,
 			 size_t len, bool fixed)