modules: tf-m: supply NXP HAL directory path for builds for LPC

For TF-M builds on LPCXPRESSO55S69 we set the path to the
NXP HAL sources that are required for building TF-M for this
platform.

Signed-off-by: Ioannis Glaropoulos <Ioannis.Glaropoulos@nordicsemi.no>