beagle: make get_expansion_id(), get_board_revision(), beagle_display_init() static

Signed-off-by: Peter Meerwald <p.meerwald@bct-electronic.com>

board/ti/beagle/beagle.c

@@ -112,7 +112,7 @@ int board_init(void)
  *		GPIO173, GPIO172, GPIO171: 1 0 1 => C4
  *		GPIO173, GPIO172, GPIO171: 0 0 0 => xM
  */
-int get_board_revision(void)
+static int get_board_revision(void)
 {
 	int revision;
 
@@ -211,7 +211,7 @@ void get_board_mem_timings(u32 *mcfg, u32 *ctrla, u32 *ctrlb, u32 *rfr_ctrl,
  *		bus 1 for the availability of an AT24C01B serial EEPROM.
  *		returns the device_vendor field from the EEPROM
  */
-unsigned int get_expansion_id(void)
+static unsigned int get_expansion_id(void)
 {
 	i2c_set_bus_num(EXPANSION_EEPROM_I2C_BUS);
 
@@ -234,7 +234,7 @@ unsigned int get_expansion_id(void)
  * Configure DSS to display background color on DVID
  * Configure VENC to display color bar on S-Video
  */
-void beagle_display_init(void)
+static void beagle_display_init(void)
 {
 	omap3_dss_venc_config(&venc_config_std_tv, VENC_HEIGHT, VENC_WIDTH);
 	switch (get_board_revision()) {