drm/ssd130x: Fix possible uninitialized usage of crtc_state variable

drm/ssd130x: Fix possible uninitialized usage of crtc_state variable

Avoid a possible uninitialized use of the crtc_state variable in function
ssd132x_primary_plane_atomic_check() and avoid the following Smatch warn:

    drivers/gpu/drm/solomon/ssd130x.c:921 ssd132x_primary_plane_atomic_check()
    error: uninitialized symbol 'crtc_state'.

Fixes: fdd591e00a9c ("drm/ssd130x: Add support for the SSD132x OLED controller family")
Reported-by: Dan Carpenter <[email protected]>
Closes: https://lore.kernel.org/dri-devel/[email protected]/
Signed-off-by: Javier Martinez Canillas <[email protected]>
Acked-by: Jocelyn Falempe <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
(cherry picked from commit 9e4db199e66d427c50458f4d72734cc4f0b92948)
Signed-off-by: Javier Martinez Canillas <[email protected]>