package/lm-sensors: remove redundant BUILD_STATIC_LIB build parameter

package/lm-sensors: remove redundant BUILD_STATIC_LIB build parameter

Commit 3e05efd76636 ("package/lm-sensors: disable static library for
shared-only build") added BUILD_STATIC_LIB to LM_SENSORS_MAKE_OPTS with
value that depends on BR2_SHARED_LIBS, but forgot to remove it from the
common LM_SENSORS_MAKE_OPTS. Fix that.

Cc: Romain Naour <romain.naour@openwide.fr>
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Acked-by: Romain Naour <romain.naour@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>