spi/spi_sh_msiof: fix wrong address calculation, which leads to an Oops

NULL + <small offset> != NULL, but reading from that <small offset> address
is usually not a very good idea and often leads to problems, like kernel
Oopses in this case, easily reproducible by writing to an SD-card, used in
SPI mode.

Signed-off-by: Guennadi Liakhovetski <[email protected]>
Signed-off-by: Grant Likely <[email protected]>
1 file changed