The FSF address has changed in the past. Instead of updating it
each time the address changes, just drop it completely treewide.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

With compressed image support TEXT_BASE will become the base
address of the uncompressed image. What the boards want instead
is the base address of the decompressor code or, if not compressed,
the base address of the uncompressed image. Use _text which is
the correct one for both cases.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Supported devices:
 - nand
 - ethernet
 - mmc0, mmc1 (on stk5v3 development board)
 - led (on stk5v3 development board)

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>