lis3: update maintainer information

In the move of the lis3 driver, the hp_accel.c file got dropped from the
MAINTAINER file. Make it explicit again that this file is tied to lis3
again.

Signed-off-by: Éric Piel <eric.piel@tremplin-utc.net>
Cc: Matthew Garrett <mjg@redhat.com>
Cc: Witold Pilat <witold.pilat@gmail.com>
Cc: Lyall Pearce <lyall.pearce@hp.com>
Cc: Malte Starostik <m-starostik@versanet.de>
Cc: Ilkka Koskinen <ilkka.koskinen@nokia.com>
Cc: Thadeu Lima de Souza Cascardo <cascardo@holoscopio.com>
Cc: Christian Lamparter <chunkeey@googlemail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

MAINTAINERS

@@ -3995,6 +3995,7 @@ M:	Eric Piel <eric.piel@tremplin-utc.net>
 S:	Maintained
 F:	Documentation/misc-devices/lis3lv02d
 F:	drivers/misc/lis3lv02d/
+F:	drivers/platform/x86/hp_accel.c
 
 LLC (802.2)
 M:	Arnaldo Carvalho de Melo <acme@ghostprotocols.net>