omap3evm: eth: split function setup_net_chip

In current implementation, the function sets up the ethernet
chip and resets it. The steps to reset depend upon the board
revision.

The patch moves the reset actions to new function reset_net_chip().

Signed-off-by: Sanjeev Premi <premi@ti.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
diff --git a/board/ti/evm/evm.h b/board/ti/evm/evm.h
index b721ad6..623cf1b 100644
--- a/board/ti/evm/evm.h
+++ b/board/ti/evm/evm.h
@@ -49,6 +49,7 @@
 
 #if defined(CONFIG_CMD_NET)
 static void setup_net_chip(void);
+static void reset_net_chip(void);
 #endif
 
 /*