Revert "cpufreq: brcmstb-avs-cpufreq: Fix initial command check"

Currently the condition ((rc != -ENOTSUPP) || (rc != -EINVAL)) is always
true because rc cannot be equal to two different values at the same time,
so it must be not equal to at least one of them. Fix the original commit
that introduced the issue.

This reverts commit 22a26cc.

Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Acked-by: Florian Fainelli <florian.fainelli@broadcom.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>

Author: ColinIanKing

drivers/cpufreq/brcmstb-avs-cpufreq.c

@@ -474,8 +474,8 @@ static bool brcm_avs_is_firmware_loaded(struct private_data *priv)
 	rc = brcm_avs_get_pmap(priv, NULL);
 	magic = readl(priv->base + AVS_MBOX_MAGIC);
 
-	return (magic == AVS_FIRMWARE_MAGIC) && ((rc != -ENOTSUPP) ||
-		(rc != -EINVAL));
+	return (magic == AVS_FIRMWARE_MAGIC) && (rc != -ENOTSUPP) &&
+		(rc != -EINVAL);
 }
 
 static unsigned int brcm_avs_cpufreq_get(unsigned int cpu)