net/ixgbe: avoid multiple definitions of bool

net/ixgbe: avoid multiple definitions of bool

Compilation issue arises due to multiple definitions of 'bool'
in 'ixgbe_ethdev.h'.

Error:
'/dpdk/drivers/net/ixgbe/ixgbe_ethdev.c: In function
‘ixgbe_dev_setup_link_alarm_handler’:
/dpdk/drivers/net/ixgbe/ixgbe_ethdev.c:4075:43:
error: passing argument 3 of ‘ixgbe_get_link_capabilities’ from
incompatible pointer type [-Werror=incompatible-pointer-types]
   ixgbe_get_link_capabilities(hw, &speed, &autoneg);
                                           ^
In file included from /dpdk/drivers/net/ixgbe/ixgbe_ethdev.c:41:0:
/dpdk/drivers/net/ixgbe/base/ixgbe_api.h:63:5: note: expected
‘bool * {aka int *}’ but argument is of type ‘_Bool *’'

Signed-off-by: Dharmik Thakkar <dharmik.thakkar@arm.com>
Reviewed-by: Phil Yang <phil.yang@arm.com>
Reviewed-by: Gavin Hu <gavin.hu@arm.com>
Reviewed-by: Ferruh Yigit <ferruh.yigit@intel.com>