raw/ifpga: fix device name format

raw/ifpga: fix device name format

The device name format used in ifpga_rawdev_create() was changed to
"IFPGA:%02x:%02x.%x", but the format used in ifpga_rawdev_destroy()
was left as "IFPGA:%x:%02x.%x", it should be changed synchronously.

To prevent further similar errors, macro "IFPGA_RAWDEV_NAME_FMT" is
defined to replace this format string.

Fixes: 9c006c45d0c5 ("raw/ifpga: scan PCIe BDF device tree")
Cc: stable@dpdk.org
Signed-off-by: Wei Huang <wei.huang@intel.com>
Acked-by: Tianfei Zhang <tianfei.zhang@intel.com>
Acked-by: Rosen Xu <rosen.xu@intel.com>