buildroot

support/kconfig: fix usage typo and align verb tenses

Fix typo 'selectes' -> 'selects'.
Additionally, change 'will exclude' to 'excludes' to align with 'selects'.

Signed-off-by: Thomas De Schampheleire <thomas.de_schampheleire@nokia.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
(cherry picked from commit 787f4fee7184e4b86343a1d6d60c303622d458b9)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>