clk: hisilicon: fix warning from smatch

drivers/clk/hisilicon/clk-hi3620.c:338
mmc_clk_delay() warn: always true condition '(para >= 0) => (0-u32max >= 0)'
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Zhangfei Gao <zhangfei.gao@linaro.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>

drivers/clk/hisilicon/clk-hi3620.c

@@ -326,7 +326,6 @@ static u32 mmc_clk_delay(u32 val, u32 para, u32 off, u32 len)
 {
 	u32 i;
 
-	if (para >= 0) {
 	for (i = 0; i < len; i++) {
 		if (para % 2)
 			val |= 1 << (off + i);
@@ -334,7 +333,7 @@ static u32 mmc_clk_delay(u32 val, u32 para, u32 off, u32 len)
 			val &= ~(1 << (off + i));
 		para = para >> 1;
 	}
-	}
+
 	return val;
 }