Integrate errata fixes for SDCTL settings.

Signed-off-by: Markus Niebel <Markus.Niebel@tqs.de>
Signed-off-by: Steffen Trumtrar <s.trumtrar@pengutronix.de>
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>

The exception vector table will become part of the uncompressed image,
so we can't reference them from the lowlevel init stuff anymore.

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

The image sizes have been hardcoded to 256K. This is inefficient
for smaller images and nonfunctional for bigger images. Calculate
the image size during compile time and use it.

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

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