[DISCO_F429ZI] missing interrupt vectors

Added some missing F429 interrupt vectors
[DISCO_F429ZZI] pin function definition

Added mostly all pin function (ADC, I2C, SPI, UART, PWM).

The basis of the target was DISCO_F407. The 429 has some additional pin
functions which are added with this commit. Also ports, pins and pin
functions of the larger packages are added not only the available of the
F429ZI package.
[DISCO_F429ZI] changed mcu names

Changed mcu names in comments from original F407 ot F429.
[DISCO_F429ZI] added a description why there are commented pwm config lines

Some text to explain the commented pwm pin config. Remove some Timer5
based pwm config.

The Timer5 lines are not allowed as pwm configs because the timer is
used by the us_ticker as mentioned at the start of the block. I've
overseen to remove these lines.
Merge pull request #544 from ohagendorf/DISCO_F429_2

HAL: Disco_F429ZI - extensions of interrupt vectors, pin names and pin functions