crypto: s5p-sss - remove redundant null check

Because clk_disable_unprepare already checked NULL clock
parameter, so the additional checks are unnecessary, just remove them.

Signed-off-by: Xu Wang <[e-mail]>
Reviewed-by: Krzysztof Kozlowski <[e-mail]>
Acked-by: Kamil Konieczny <[e-mail]>
Signed-off-by: Herbert Xu <[e-mail]>

drivers/crypto/s5p-sss.c

···
 	tasklet_kill(&pdata->tasklet);
 
 err_irq:
-	if (pdata->pclk)
-		clk_disable_unprepare(pdata->pclk);
+	clk_disable_unprepare(pdata->pclk);
 
 err_clk:
 	clk_disable_unprepare(pdata->clk);
···
 		pdata->use_hash = false;
 	}
 
-	if (pdata->pclk)
-		clk_disable_unprepare(pdata->pclk);
+	clk_disable_unprepare(pdata->pclk);
 
 	clk_disable_unprepare(pdata->clk);
 	s5p_dev = NULL;