Macro PCI_CFG_SPACE_EXP_SIZE isn't defined in kernel 4.9.x, so
we use a fixed value here instead.
Fix issue #2282.
Change-Id: Ife1444e919e4c1dc9328437002c15befe2f393e7
Signed-off-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/10691
Community-CI: Mellanox Build Bot
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>