RAL_ACK_SIZE     1372 dev/ic/rt2560.c #define RAL_ACK_SIZE	14	/* 10 + 4(FCS) */
RAL_ACK_SIZE     1263 dev/ic/rt2661.c #define RAL_ACK_SIZE	14	/* 10 + 4(FCS) */
RAL_ACK_SIZE      660 dev/usb/if_ral.c #define RAL_ACK_SIZE	14	/* 10 + 4(FCS) */