mtd: only build mtdraw_raw_to_mtd_offset when write support is enabled
mtdraw_raw_to_mtd_offset() is only used from mtdraw_erase(), so will
only be referenced when MTD write support is enabled. This fixes a
harmless warning.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
1 parent 441941f commit 0d86982d3dbcde7ca958fffe3bc57850bc7f43d8
@Lucas Stach Lucas Stach authored on 11 May 2017
Sascha Hauer committed on 17 May 2017
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drivers/mtd/mtdraw.c