drm/client: fix MODULE_PARM_DESC string for "active"

drm/client: fix MODULE_PARM_DESC string for "active"

The MODULE_PARM_DESC string for the "active" parameter is missing a
space and has an extraneous trailing ']' character. Correct these.

Before patch:
$ modinfo -p ./drm_client_lib.ko
active:Choose which drm client to start, default isfbdev] (string)

After patch:
$ modinfo -p ./drm_client_lib.ko
active:Choose which drm client to start, default is fbdev (string)

Fixes: f7b42442c4ac ("drm/log: Introduce a new boot logger to draw the kmsg on the screen")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Jocelyn Falempe <jfalempe@redhat.com>
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patch.msgid.link/20251112010920.2355712-1-rdunlap@infradead.org