spi: sg2044-nor: fix uninitialized variable in probe

The "base" pointer is uninitialized.  It should be "spifmc->io_base"
instead.

Fixes: de16c322 ("spi: sophgo: add SG2044 SPI NOR controller driver")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Reviewed-by: Tudor Ambarus <tudor.ambarus@linaro.org>
Link: https://patch.msgid.link/d343921b-16b8-429b-888a-f51bb6f2edc8@stanley.mountain


Signed-off-by: Mark Brown <broonie@kernel.org>