leds: pca9532: Explicitly disable hardware blink when PWM1 is unavailable

When a LED is used to drive a beeper, it uses PWM1. This can cause
conflicts if an other LED want to use PWM1 for blinking.

Disable use of hardware for blinking when one or more LEDs are used to
drive beepers.

Signed-off-by: Bastien Curutchet <bastien.curutchet@bootlin.com>
Link: https://lore.kernel.org/r/20240617143910.154546-4-bastien.curutchet@bootlin.com


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