mtd: spi-nor-core: Check return value of write_disable() in spi_nor_erase()

The cleanup code of spi_nor_erase() function calls write_disable(), but
does not return it's return value even in case of failure. Fix this.

Signed-off-by: Marek BehĂșn <marek.behun@nic.cz>
Reviewed-by: Simon Glass <sjg@chromium.org>
Tested-by: Masami Hiramatsu <masami.hiramatsu@linaro.org>
1 file changed