[Disco_F429ZI] extensions of interrupt vectors, pin names and pin functions

Added some missing F429 interrupt vectors, pin functions, port and pin names.

The basis of the target was DISCO_F407. 
The STM32F429 has some additional pin functions which are added with these commits. Also all port names, pin names and pin functions of the larger packages are added not only the available ones of the F429ZI package. 
The mcu name in linker script and startup file is changed to 429.
OK. For example you can see that on PA_5 you can have a PWM using either Timer2/Channel1 or Timer8/Channel1N. Today I have decided to use Timer2/Channel1. But you can also notice that Timer2/Channel1 is also used on PA_0. That means that today you cannot output two different PWM signals on PA_0 and PA_5 at the same time. If someone wants this, he will need to change the timer that is used on PA_5. This is why I have let the other possibilities commented to make this change easier.