ARM: s3c24xx: Fix boolean expressions in osiris_dvs_notify

commit e247723 upstream.

Fix boolean expressions by using logical AND operator '&&' instead of
bitwise operator '&'.

This issue was detected with the help of Coccinelle.

Fixes: 4fa084a ("ARM: OSIRIS: DVS (Dynamic Voltage Scaling) supoort.")
Cc: stable@vger.kernel.org
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
[krzk: Fix -Wparentheses warning]
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

arch/arm/mach-s3c24xx/mach-osiris-dvs.c

@@ -70,16 +70,16 @@ static int osiris_dvs_notify(struct notifier_block *nb,
 
  switch (val) {
  case CPUFREQ_PRECHANGE:
- if (old_dvs & !new_dvs ||
- cur_dvs & !new_dvs) {
+ if ((old_dvs && !new_dvs) ||
+ (cur_dvs && !new_dvs)) {
  pr_debug("%s: exiting dvs\n", __func__);
  cur_dvs = false;
  gpio_set_value(OSIRIS_GPIO_DVS, 1);
  }
  break;
  case CPUFREQ_POSTCHANGE:
- if (!old_dvs & new_dvs ||
- !cur_dvs & new_dvs) {
+ if ((!old_dvs && new_dvs) ||
+ (!cur_dvs && new_dvs)) {
  pr_debug("entering dvs\n");
  cur_dvs = true;
  gpio_set_value(OSIRIS_GPIO_DVS, 0);