leds: qcom-lpg: Drop assignment to struct pwmchip::base

Since commit f9a8ee8c ("pwm: Always allocate PWM chip base ID
dynamically") there is no effect any more for assigning this variable. See
pwmchip_add() which unconditionally overwrites this member.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/20230728065739.580281-1-u.kleine-koenig@pengutronix.de


Signed-off-by: Lee Jones <lee@kernel.org>