OMAP3: Move wait_on_value() function to not duplicate code

OMAP3: Move wait_on_value() function to not duplicate code

The wait_on_value() function is implemented by various boards, this
patch moves this function to a common place to not duplicate code.

 board/omap3530beagle/omap3530beagle.c :216:u32 wait_on_value(u32 read_bit_mask, u32 match_value, u32 read_addr, u32 bound)
 board/igep00x0/igep00x0.c             :90:u32 wait_on_value(u32 read_bit_mask, u32 match_value, u32 read_addr, u32 bound)
 board/omap3430sdp/omap3430sdp.c       :104:u32 wait_on_value(u32 read_bit_mask, u32 match_value, u32 read_addr, u32 bound)
 board/omap3evm/omap3evm.c             :148:u32 wait_on_value(u32 read_bit_mask, u32 match_value, u32 read_addr, u32 bound)
 board/omap3430labrador/omap3430sdp.c  :101:u32 wait_on_value(u32 read_bit_mask, u32 match_value, u32 read_addr, u32 bound)
 board/overo/overo.c                   :207:u32 wait_on_value(u32 read_bit_mask, u32 match_value, u32 read_addr, u32 bound)

Signed-off-by: Enric Balletbo i Serra <eballetbo@gmail.com>
Signed-off-by: Anand Gadiyar <gadiyar@ti.com>