Rom Bank 1 has no size constraint, can increase romldr (oversize) without build issue, bank truncation
Rom bank 2 usrrom (last app) has size constraint check, shouldnt be function of app
Rom bank 2 usr rom pads to end of 32k in its Size, unnecessary as handled by "srec_cat -crop"
So
* move out the bank size protections (from user rom) into layout.inc
* ensre bank 1 has same protection as bank2.
* make user rom a realistic size ($200), padding handled by crc check
* also good to .ECHO overall sizes of banks, improve logging.