dm646x: pass board revision info to kernel

add a function in board file to pass board revision
info to kernel. Revision number 0 and 1 are passed in
case of DM6467 and DM6467T respectively.

Signed-off-by: Manjunath Hadli <manjunath.hadli@ti.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>

board/davinci/dm6467evm/dm6467evm.c

@@ -24,6 +24,26 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
+#define REV_DM6467EVM		0
+#define REV_DM6467TEVM		1
+/*
+ * get_board_rev() - setup to pass kernel board revision information
+ * Returns:
+ * bit[0-3]	System clock frequency
+ * 0000b	- 27 MHz
+ * 0001b	- 33 MHz
+ */
+u32 get_board_rev(void)
+{
+
+#ifdef DAVINCI_DM6467TEVM
+	return REV_DM6467TEVM;
+#else
+	return REV_DM6467EVM;
+#endif
+
+}
+
 int board_init(void)
 {
 	gd->bd->bi_arch_number = MACH_TYPE_DAVINCI_DM6467_EVM;