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For invalid bus number, current code returns NULL in the default case of switch-case statements. In additional, pins[bus] is always not NULL because it is the address of specific row of the two-dimensional array. Thus this patch removes these unnecessary test. Signed-off-by: Axel Lin <axel.lin@ingics.com> Acked-by: Scott Jiang <scott.jiang.linux@gmail.com> Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>