vdpa/octeon_ep: Fix format specifier for pointers in debug messages

vdpa/octeon_ep: Fix format specifier for pointers in debug messages

Updates the debug messages in octep_vdpa_hw.c to use the %p format
specifier for pointers instead of casting them to u64.

Fixes smatch warning:
octep_hw_caps_read() warn: argument 3 to %016llx specifier is cast
from pointer

Fixes: 8b6c724cdab8 ("virtio: vdpa: vDPA driver for Marvell OCTEON DPU devices")
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Closes: https://lore.kernel.org/r/202409160431.bRhZWhiU-lkp@intel.com/
Signed-off-by: Srujana Challa <schalla@marvell.com>
Message-Id: <20240916162255.677774-1-schalla@marvell.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>