firmware: arm_scmi: remove redundant null check on array

The null check on clk->name is redundant since name is a char array
and can never be null, so the check is always true.  Remove it.

Detected by CoverityScan, CID#1466117 ("Array compared against 0")
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Signed-off-by: NSudeep Holla <sudeep.holla@arm.com>

drivers/firmware/arm_scmi/clock.c

@@ -284,7 +284,7 @@ scmi_clock_info_get(const struct scmi_handle *handle, u32 clk_id)
 	struct clock_info *ci = handle->clk_priv;
 	struct scmi_clock_info *clk = ci->clk + clk_id;
 
-	if (!clk->name || !clk->name[0])
+	if (!clk->name[0])
 		return NULL;
 
 	return clk;