omap3: cm-t3517: add board specific get_board_rev()

CM-T3517 has several HW revisions.
Add board specific get_board_rev() callback to retrieve revision number.

Signed-off-by: Dmitry Lifshitz <lifshitz@compulab.co.il>
Reviewed-by: Igor Grinberg <grinberg@compulab.co.il>

board/compulab/cm_t3517/cm_t3517.c

@@ -98,6 +98,15 @@ int board_init(void)
 	return 0;
 }
 
+/*
+ * Routine: get_board_rev
+ * Description: read system revision
+ */
+u32 get_board_rev(void)
+{
+	return cl_eeprom_get_board_rev(CONFIG_SYS_I2C_EEPROM_BUS);
+};
+
 int misc_init_r(void)
 {
 	cl_print_pcb_info();