support: add loader script for 64k sram/256k flash

Preparation for 32F01CDiscovery board bringup

Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
Signed-off-by: Perry Hung <perry@leaflabs.com>
Add STM32F2 I2C support.

Untested, but fixes the build and at least provides the correct
register map and base pointers.

Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
Rename various "stm32f2" directories "stm32f2-f4".

Preparatory patch for adding STM32F4 support.

Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>