pps: adjust references to actual name of uapi header file

Commit 86b525b ("drivers pps: add PPS generators support") adds a file
entry in MAINTAINERS and a reference in the ioctl-number documentation
referring to the file pps-gen.h, whereas the file added in this commit is
named pps_gen.h.

Adjust the two references to the actual name of the uapi header file.
While at it, put the entry in MAINTAINERS at the right place for
alphabetical ordering.

Fixes: 86b525b ("drivers pps: add PPS generators support")
Signed-off-by: Lukas Bulwahn <lukas.bulwahn@redhat.com>
Link: https://lore.kernel.org/r/20250110105000.56228-1-lukas.bulwahn@redhat.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Author: bulwahn

Documentation/userspace-api/ioctl/ioctl-number.rst

@@ -283,7 +283,7 @@ Code  Seq#    Include File                                           Comments
 'p'   80-9F  linux/ppdev.h                                           user-space parport
                                                                      <mailto:tim@cyberelk.net>
 'p'   A1-A5  linux/pps.h                                             LinuxPPS
-'p'   B1-B3  linux/pps-gen.h                                         LinuxPPS
+'p'   B1-B3  linux/pps_gen.h                                         LinuxPPS
                                                                      <mailto:giometti@linux.it>
 'q'   00-1F  linux/serio.h
 'q'   80-FF  linux/telephony.h                                       Internet PhoneJACK, Internet LineJACK

MAINTAINERS

@@ -18729,8 +18729,8 @@ F:	Documentation/devicetree/bindings/pps/pps-gpio.yaml
 F:	Documentation/driver-api/pps.rst
 F:	drivers/pps/
 F:	include/linux/pps*.h
-F:	include/uapi/linux/pps-gen.h
 F:	include/uapi/linux/pps.h
+F:	include/uapi/linux/pps_gen.h
 
 PRESSURE STALL INFORMATION (PSI)
 M:	Johannes Weiner <hannes@cmpxchg.org>