[PATCH -next] selftests: gpio: gpio-sim: remove bashisms

[Bartosz Golaszewski <brgl@bgdev.pl>]

'==' is a bashisms and not understood by POSIX shell. Drop it from
gpio-sim selftests.

Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
---
I ran the newly applied patches on a different system and noticed the
tests now fail. I missed '==' operators for string comparison I used in
some places.

 tools/testing/selftests/gpio/gpio-sim.sh | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/gpio/gpio-sim.sh b/tools/testing/selftests/gpio/gpio-sim.sh
index d335a975890c..c913d5aec768 100755
--- a/tools/testing/selftests/gpio/gpio-sim.sh
+++ b/tools/testing/selftests/gpio/gpio-sim.sh
@@ -23,12 +23,12 @@ remove_chip() {
 
 	for FILE in $CONFIGFS_DIR/$CHIP/*; do
 		BANK=`basename $FILE`
-		if [ "$BANK" == "live" ] || [ "$BANK" == "dev_name" ]; then
+		if [ "$BANK" = "live" ] || [ "$BANK" = "dev_name" ]; then
 			continue
 		fi
 
 		LINES=`ls $CONFIGFS_DIR/$CHIP/$BANK/ | egrep ^line`
-		if [ "$?" == 0 ]; then
+		if [ "$?" = 0 ]; then
 			for LINE in $LINES; do
 				if [ -e $CONFIGFS_DIR/$CHIP/$BANK/$LINE/hog ]; then
 					rmdir $CONFIGFS_DIR/$CHIP/$BANK/$LINE/hog || \
-- 
2.30.1