SPL: make struct spl_image 64-bit safe

SPL: make struct spl_image 64-bit safe

Since entry_point and load_addr are addresses, they should be
represented as longs to cover the whole address space and to avoid
warning when compiling the SPL in 64-bit.
Also adjust debug prints to add the 'l' specifier, where needed.

Signed-off-by: Andre Przywara <[email protected]>
Reviewed-by: Alexander Graf <[email protected]>
Reviewed-by: Simon Glass <[email protected]>
Reviewed-by: Tom Rini <[email protected]>
Acked-by: Maxime Ripard <[email protected]>
Reviewed-by: Jagan Teki <[email protected]>