soc/stm32f1: add IRQ numbers listing

Add a list of symbolic constants for IRQ lines available on
STM32F1 line of MCUs.

Change-Id: Iebf1847719c0db31cf852529fe5876e3cabbfe52
Origin: Original
Signed-off-by: Maciej Borzecki <maciek.borzecki@gmail.com>
2 files changed