8514/A: Fix first NVRAM initialization on MCA bus version made by ATI

Prior to this change it was not possible to start the emulated machine
with this graphics adapter installed on any operating system different
from Windows, causing crash with exit code 11.

src/video/vid_ati_eeprom.c

@@ -56,7 +56,6 @@ ati_eeprom_load_mach8(ati_eeprom_t *eeprom, char *fn, int mca)
     size = 128;
     if (!fp) {
         if (mca) {
-            (void) fseek(fp, 2L, SEEK_SET);
             memset(eeprom->data + 2, 0xff, size - 2);
             fp = nvr_fopen(eeprom->fn, "wb");
             fwrite(eeprom->data, 1, size, fp);