[En-Nut-Discussion] eboot bug fix

[Jean Pierre Gauthier]

eboot assumes that its size is 8K in tftp.c (instead 4K) for 'self' flash
write protection. 
Bug appairs when your code crosses over 128-8K limit. 
Fix:
Replace 480 (pages of 256 bytes) by 496 in FlashPage sub-routine test.
Jean Pierre



static void FlashPage(u_short page, void *data, u_short len)
{
    u_short i;
    u_short *wp = data;

    if (len > 256)
        len = 256;

    if (page >= 256) {
        if (page >= 496) /* bug fix for 4K, was 480 for 8K eboot */
            return;
        RAMPZ = 1;
    } else