Fix linker error if FB=m about missing fb_io_read and fb_io_write. The
linker's error message suggests that this config setting has already
been broken for other symbols.

  All errors (new ones prefixed by >>):

     sh4-linux-ld: drivers/video/fbdev/sh7760fb.o: in function `sh7760fb_probe':
     sh7760fb.c:(.text+0x374): undefined reference to `framebuffer_alloc'
     sh4-linux-ld: sh7760fb.c:(.text+0x394): undefined reference to 
`fb_videomode_to_var'
     sh4-linux-ld: sh7760fb.c:(.text+0x39c): undefined reference to 
`fb_alloc_cmap'
     sh4-linux-ld: sh7760fb.c:(.text+0x3a4): undefined reference to 
`register_framebuffer'
     sh4-linux-ld: sh7760fb.c:(.text+0x3ac): undefined reference to 
`fb_dealloc_cmap'
     sh4-linux-ld: sh7760fb.c:(.text+0x434): undefined reference to 
`framebuffer_release'
     sh4-linux-ld: drivers/video/fbdev/sh7760fb.o: in function 
`sh7760fb_remove':
     sh7760fb.c:(.text+0x800): undefined reference to `unregister_framebuffer'
     sh4-linux-ld: sh7760fb.c:(.text+0x804): undefined reference to 
`fb_dealloc_cmap'
     sh4-linux-ld: sh7760fb.c:(.text+0x814): undefined reference to 
`framebuffer_release'
  >> sh4-linux-ld: drivers/video/fbdev/sh7760fb.o:(.rodata+0xc): undefined 
reference to `fb_io_read'
  >> sh4-linux-ld: drivers/video/fbdev/sh7760fb.o:(.rodata+0x10): undefined 
reference to `fb_io_write'
     sh4-linux-ld: drivers/video/fbdev/sh7760fb.o:(.rodata+0x2c): undefined 
reference to `cfb_fillrect'
     sh4-linux-ld: drivers/video/fbdev/sh7760fb.o:(.rodata+0x30): undefined 
reference to `cfb_copyarea'
     sh4-linux-ld: drivers/video/fbdev/sh7760fb.o:(.rodata+0x34): undefined 
reference to `cfb_imageblit'

Suggested-by: Randy Dunlap <rdun...@infradead.org>
Reported-by: kernel test robot <l...@intel.com>
Closes: 
https://lore.kernel.org/oe-kbuild-all/202309130632.ls04cpwu-...@intel.com/
Signed-off-by: Thomas Zimmermann <tzimmerm...@suse.de>
---
 drivers/video/fbdev/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/video/fbdev/Kconfig b/drivers/video/fbdev/Kconfig
index 4455bfd57f0ec..64ccb34d882dd 100644
--- a/drivers/video/fbdev/Kconfig
+++ b/drivers/video/fbdev/Kconfig
@@ -1756,7 +1756,7 @@ config FB_COBALT
 
 config FB_SH7760
        bool "SH7760/SH7763/SH7720/SH7721 LCDC support"
-       depends on FB && (CPU_SUBTYPE_SH7760 || CPU_SUBTYPE_SH7763 \
+       depends on FB=y && (CPU_SUBTYPE_SH7760 || CPU_SUBTYPE_SH7763 \
                || CPU_SUBTYPE_SH7720 || CPU_SUBTYPE_SH7721)
        select FB_IOMEM_HELPERS
        help
-- 
2.42.0

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