spi: meson-spicc: fix do_div build error on non-arm64

This fixes :
error: passing argument 1 of '__div64_32' from incompatible pointer type

By passing an uint64_t as first variable to do_div().

Reported-by: kernel test robot <lkp@intel.com>
Fixes: 04694e50

 ("spi: meson-spicc: move wait completion in driver to take bursts delay in account")
Acked-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20221027-b4-spicc-burst-delay-fix-v2-0-8cc2bab3417a@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>