rtc: pcf85063: Update the PCF85063A datasheet revision

After updating the datasheet URL, the PCF85063A  datasheet revision
has changed.

Adjust it accordingly.
Reported-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20210624120953.2313378-1-festevam@gmail.com

drivers/rtc/rtc-pcf85063.c

@@ -24,7 +24,7 @@
  *  https://www.nxp.com/docs/en/data-sheet/PCF85063A.pdf
  *  https://www.nxp.com/docs/en/data-sheet/PCF85063TP.pdf
  *
- *  PCF85063A -- Rev. 6 — 18 November 2015
+ *  PCF85063A -- Rev. 7 — 30 March 2018
  *  PCF85063TP -- Rev. 4 — 6 May 2015
  *
  *  https://www.microcrystal.com/fileadmin/Media/Products/RTC/App.Manual/RV-8263-C7_App-Manual.pdf