ARM: PL08x: prefix hex numbers with 0x

A driver which emits both decimal and hex numbers in its printk
creates confusion as to what is what.  Prefix hex numbers with 0x.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>