Fix VROM address handling in sym_info.py

[cadmic]

Ever since mapfile_parser 2.7.0, sym_info.py always treats address as VRAM addresses instead of VROM addresses, even for very low numbers:

$ ./sym_info.py -v ntsc-1.0 0x1F20
0x1F20 is at 0x1F20 bytes inside 'Soundfont_0_Start' (VRAM: 0x00000000, VROM: 0x00D390, SIZE: 0x3AA0, build/ntsc-1.0/assets/audio/soundfonts/Soundfont_0.o)

This restores the previous logic where a number >= 0x01000000 is treated as a VRAM address and a number < 0x01000000 is treated as a VROM address.

[cadmic]

@AngheloAlf could you take a look? Not sure if you had plans here