i40e: fix build warnings in i40e_alloc.h

stable inclusion
from stable-v5.10.184
commit 15ca8d584c1abc81c6f01d9aae8639630e733b46
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I8IRR2

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=15ca8d584c1abc81c6f01d9aae8639630e733b46



--------------------------------

Not upstream as it was fixed in a much larger api change in newer
kernels.

gcc-13 rightfully complains that enum is not the same as an int, so fix
up the function prototypes in i40e_alloc.h to be correct, solving a
bunch of build warnings.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: sanglipeng <sanglipeng1@jd.com>