MAINTAINERS: Update Uwe's email address, drop SIOX maintenance

In the context of changing my career path, my Pengutronix email address
will soon stop to be available to me. Update the PWM maintainer entry to
my kernel.org identity.

I drop my co-maintenance of SIOX. Thorsten will continue to care for
it with the support of the Pengutronix kernel team.

Signed-off-by: Uwe Kleine-König <[email protected]>
Acked-by: Thorsten Scherer <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Uwe Kleine-König <[email protected]>

Author: Uwe Kleine-König

MAINTAINERS

@@ -17873,7 +17873,7 @@ F:	Documentation/devicetree/bindings/leds/irled/pwm-ir-tx.yaml
 F:	drivers/media/rc/pwm-ir-tx.c
 
 PWM SUBSYSTEM
-M:	Uwe Kleine-König <[email protected]>
+M:	Uwe Kleine-König <[email protected]>
 L:	[email protected]
 S:	Maintained
 Q:	https://patchwork.ozlabs.org/project/linux-pwm/list/
@@ -20177,7 +20177,6 @@ F:	include/linux/platform_data/simplefb.h
 
 SIOX
 M:	Thorsten Scherer <[email protected]>
-M:	Uwe Kleine-König <[email protected]>
 R:	Pengutronix Kernel Team <[email protected]>
 S:	Supported
 F:	drivers/gpio/gpio-siox.c