kconfig: fix typo 'parition'

Replaced misspelled words "parition"/"paritioning" (missing 't') in two
Kconfig files by correct words "partition"/"partitioning"

Signed-off-by: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com>
Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>