Add the missing platform_device_put() before return from
sysfb_create_simplefb() in the error handling case.

Fixes: 8633ef82 ("drivers/firmware: consolidate EFI framebuffer setup for all arches")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Link: https://lore.kernel.org/r/20211231080431.15385-1-linmq006@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>