ASoC: dma-sh7760: cleanup a debug printk

The intent was to print the address as a hexadecimal but there is an
extra "u" in the "0x%08ulx" format specification so it is displayed as
decimal.

Fixes: aef3b06a

 ("[ALSA] SH7760 ASoC support")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Mark Brown <broonie@kernel.org>