dt-bindings: rtc: ti,bq32k: take maintainership

Take maintainership of the binding as PAvel said he doesn't have the
hardware anymore.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Acked-by: Pavel Machek <pavel@ucw.cz>
Link: https://lore.kernel.org/r/20210620224030.1115356-1-alexandre.belloni@bootlin.com

Author: alexandrebelloni

Documentation/devicetree/bindings/rtc/ti,bq32000.yaml

@@ -7,7 +7,7 @@ $schema: http://devicetree.org/meta-schemas/core.yaml#
 title: TI BQ32000 I2C Serial Real-Time Clock
 
 maintainers:
-  - Pavel Machek <pavel@ucw.cz>
+  - Alexandre Belloni <alexandre.belloni@bootlin.com>
 
 allOf:
   - $ref: rtc.yaml#