spi-cadence-quadspi: remove unused variable
Created by: MichaIng
Introduced with the last commit https://github.com/starfive-tech/linux/commit/16d2a17eb3, the kernel build now seems to correctly indicate that *cqspi
is unused and hence the declaration should be removed from this function:
CC drivers/spi/spi-cadence-quadspi.o
drivers/spi/spi-cadence-quadspi.c: In function ‘cqspi_exec_mem_op’:
drivers/spi/spi-cadence-quadspi.c:1233:26: warning: unused variable ‘cqspi’ [-Wunused-variable]
1233 | struct cqspi_st *cqspi = spi_master_get_devdata(mem->spi->master);
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