fbdev: Add missing dependency on CONFIG_DMA_SHARED_BUFFER

The change that added dma-buf support to fbdev (fbdev: add dma-buf
support) didn't correctly list dma-buf as a dependency. List it as a
dependency of CONFIG_FB to avoid build errors.

Change-Id: I8539b51c36c202a03b04a6888d03e8d28b0a78c4
Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com>
1 file changed