[FE7/FE8] Difficulty stat changes

[Gryz]

FE7
034878 : Normal promoted enemy level bonus
034880 : Hard promoted enemy level bonus

FE8
037B52 : Easy + Normal promoted enemy level bonus
037B5C : Hard promoted enemy level bonus

@Venno

As you may know, in FE7 the hard mode bonus levels only apply on Hector Hard. Should you want to allow enemies to receive bonus levels on Eliwood Hard mode as well, simply make the following change:

-At 0x0A6C8, replace the twelve bytes there with 000000000000.
-At 0x799D6, replace the twelve bytes there with 000000000000.

This makes enemies on Lyn Hard get bonuses too. (Also, you want to replace 6 bytes, not 12)