linker: Modify linker scripts to be more generic

linker: Modify linker scripts to be more generic

Make use of "IMAGE_MAX_SIZE" and "IMAGE_TEXT_BASE" rather than
CONFIG_SPL_MAX_SIZE and CONFIG_SPL_TEXT_BASE.  This lets us re-use the
same script for both SPL and TPL.  Add logic to scripts/Makefile.spl to
pass in the right value when preprocessing the script.

Cc: Stefano Babic <[email protected]>
Cc: Fabio Estevam <[email protected]>
Cc: Jagan Teki <[email protected]>
Cc: Maxime Ripard <[email protected]>
Cc: Andreas Bießmann <[email protected]>
Cc: Philipp Tomsich <[email protected]>
Cc: Michal Simek <[email protected]>
Cc: Daniel Schwierzeck <[email protected]>
Cc: York Sun <[email protected]>
Cc: Bin Meng <[email protected]>
Cc: Heiko Schocher <[email protected]>
Cc: Adam Ford <[email protected]>
Signed-off-by: Tom Rini <[email protected]>
Reviewed-by: Daniel Schwierzeck <[email protected]>
Tested-by: Daniel Schwierzeck <[email protected]>
Tested-by: Adam Ford <[email protected]> #da850evm & omap3_logic_somlv
Reviewed-by: Simon Goldschmidt <[email protected]>