When BR2_UCLIBC_ARM_BX is not set, UCLIBC_OPT_UNSET gets called with an extra
argument. Remove it.
Signed-off-by: Justin Maggard <jmaggard10@gmail.com> Acked-by: Thomas De Schampheleire <thomas.de.schampheleire@gmail.com> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>