spi: spi-qpic-snand: fix NAND_READ_LOCATION_2 register handling

spi: spi-qpic-snand: fix NAND_READ_LOCATION_2 register handling

The precomputed value for the NAND_READ_LOCATION_2 register should be
stored in 'snandc->regs->read_location2'.

Fix the qcom_spi_set_read_loc_first() function accordingly.

Fixes: 7304d1909080 ("spi: spi-qpic: add driver for QCOM SPI NAND flash Interface")
Signed-off-by: Gabor Juhos <j4g8y7@gmail.com>
Reviewed-by: Md Sadre Alam <quic_mdalam@quicinc.com>
Link: https://patch.msgid.link/20250428-qpic-snand-readloc2-fix-v1-1-50ce0877ff72@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>