Fix shell check

providers/iiotg/units/ishtp/jobs.pxu

@@ -13,7 +13,7 @@ command:
     for m in $expected_modules
     do
         echo "Checking module: $m"
-        if ! [ "$(lsmod | grep -w $m)" ]; then
+        if ! lsmod | grep -qw "$m"; then
             echo "FAIL: The '$m' module is not loaded!"
             EXIT=1
         else
@@ -53,13 +53,13 @@ imports: from com.canonical.plainbox import manifest
 requires:
     manifest.has_eclite == 'True'
 command:
-    lsmod | grep -w ishtp_eclite
-    if [[ "$?" -ne 0 ]]; then
+    if lsmod | grep -w ishtp_eclite; then
+        echo "ishtp_eclite module loaded"
+    else
         echo "The 'ishtp_eclite' module isn't loaded!"
         echo "Please make sure this feature is supported on this platform and check the BIOS setting."
         exit 1
     fi
-    echo "ishtp_eclite module loaded"
 
 unit: job
 category_id: intel-ishtp