memory: tegra: remove redundant variable initialization

tegra210_emc_table_device_init() sets count = 0 twice, so
remove the second instance.

Signed-off-by: Diogo Ivo <diogo.ivo@tecnico.ulisboa.pt>
Link: https://lore.kernel.org/r/20230319171303.120777-1-diogo.ivo@tecnico.ulisboa.pt


Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>