drm/rockchip: logo: fix logo memory end on free

drm/rockchip: logo: fix logo memory end on free

It's mistake using logo size as logo memory end, and that would cause:

[    8.443899] BUG: Bad page state in process recovery  pfn:7dcc3
[    8.443903] page:effb3860 count:0 mapcount:3 mapping:eebdf784 index:0x15
[    8.443907] flags: 0x4004007c(referenced|uptodate|dirty|lru|active|swapbacked)
[    8.443918] page dumped because: PAGE_FLAGS_CHECK_AT_FREE flag(s) set
[    8.443922] bad because of flags:
[    8.443924] flags: 0x60(lru|active)
[    8.443930] Modules linked in:
[    8.443935] CPU: 0 PID: 170 Comm: recovery Tainted: G    B           4.4.55 #70
[    8.443939] Hardware name: Rockchip (Device Tree)
[    8.443947] [<c010f55c>] (unwind_backtrace) from [<c010b7ec>] (show_stack+0x10/0x14)
[    8.443955] [<c010b7ec>] (show_stack) from [<c03bc3a8>] (dump_stack+0x7c/0x9c)
[    8.443963] [<c03bc3a8>] (dump_stack) from [<c01eb430>] (bad_page+0xe4/0x114)
[    8.443971] [<c01eb430>] (bad_page) from [<c01eb550>] (free_pages_prepare+0xf0/0x294)
[    8.443978] [<c01eb550>] (free_pages_prepare) from [<c01ed654>] (free_hot_cold_page+0x28/0x14c)
[    8.443987] [<c01ed654>] (free_hot_cold_page) from [<c01ed954>] (free_reserved_area+0x90/0xdc)
[    8.443996] [<c01ed954>] (free_reserved_area) from [<c04749f4>] (rockchip_free_loader_memory+0xf0/0x118)
[    8.444006] [<c04749f4>] (rockchip_free_loader_memory) from [<c0475b14>] (rockchip_drm_fb_destroy+0xbc/0xd0)
[    8.444015] [<c0475b14>] (rockchip_drm_fb_destroy) from [<c04581e0>] (drm_mode_set_config_internal+0xa8/0xc4)
[    8.444024] [<c04581e0>] (drm_mode_set_config_internal) from [<c045ce24>] (drm_mode_setcrtc+0x3a8/0x464)
[    8.444032] [<c045ce24>] (drm_mode_setcrtc) from [<c044f634>] (drm_ioctl+0x278/0x43c)
[    8.444039] [<c044f634>] (drm_ioctl) from [<c023ea58>] (do_vfs_ioctl+0x564/0x6a0)
[    8.444047] [<c023ea58>] (do_vfs_ioctl) from [<c023ebe0>] (SyS_ioctl+0x4c/0x74)
[    8.444055] [<c023ebe0>] (SyS_ioctl) from [<c0107180>] (ret_fast_syscall+0x0/0x3c

Change-Id: I833a27464d9d33f6864039faa61e7500a3b936b3
Signed-off-by: Mark Yao <mark.yao@rock-chips.com>