fbdev: au1100fb: Use proper conversion specifiers in printk formats

fbdev: au1100fb: Use proper conversion specifiers in printk formats

%zu is the dedicated type for size_t. %d only works on 32bit
architectures where size_t is typedef'd to be unsigned int. (And then
the signedness doesn't fit, but `gcc -Wformat` doesn't stumble over this.
Also the size of dma_addr_t is architecture dependent and it should be
printkd using %pad (and the value passed by reference).

This prepares allowing this driver to be compiled on non-mips platforms.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com>
Signed-off-by: Helge Deller <deller@gmx.de>