imx: ahab: fix compiler warnings in debug

arch/arm/mach-imx/imx8/ahab.c: In function ‘authenticate_os_container’:
arch/arm/mach-imx/imx8/ahab.c:96:9: warning: format ‘%x’ expects argument of type
‘unsigned int’, but argument 9 has type ‘ulong {aka long unsigned int}’ [-Wformat=]
   debug("img %d, dst 0x%x, src 0x%x, size 0x%x\n",

Fix those by using "%lu" specified.

Signed-off-by: Oliver Graute <oliver.graute@kococonnector.com>
Cc: Stefano Babic <sbabic@denx.de>
Cc: uboot-imx <uboot-imx@nxp.com>