firmware: common: pcie: pcie.h: increase MPPA_PCIE_ETH_IF_MAX to 4
firmware: common: pcie: pcie.h: increase MPPA_PCIE_ETH_IF_MAX to 4

kalray/odp-mppa,kalray/odp-mppa,kalray/odp-mppa,kalray/odp-mppa,kalray/odp-mppa,kalray/odp-mppa,kalray/odp-mppa