kernel-install: use log_verbose everywhere

src/kernel-install/kernel-install.in

@@ -215,7 +215,7 @@ for pref in $BOOT_ROOT_SEARCH; do
             log_verbose "$pref/$suff exists, using BOOT_ROOT=$BOOT_ROOT, ENTRY_TOKEN=$ENTRY_TOKEN"
             break 2
         else
-            [ "$KERNEL_INSTALL_VERBOSE" -gt 0 ] && echo "$pref/$suff not found…"
+            log_verbose "$pref/$suff not found…"
         fi
 
         if [ -d "$pref/loader/entries" ]; then
@@ -240,14 +240,12 @@ done
 
 if [ -z "$BOOT_ROOT" ]; then
     BOOT_ROOT="/boot"
-    [ "$KERNEL_INSTALL_VERBOSE" -gt 0 ] && \
-        echo "KERNEL_INSTALL_BOOT_ROOT autodection yielded no candidates, using \"$BOOT_ROOT\""
+    log_verbose "KERNEL_INSTALL_BOOT_ROOT autodetection yielded no candidates, using \"$BOOT_ROOT\""
 fi
 
 if [ -z "$ENTRY_TOKEN" ]; then
     ENTRY_TOKEN="$MACHINE_ID"
-    [ "$KERNEL_INSTALL_VERBOSE" -gt 0 ] && \
-        echo "No entry-token candidate matched, using \"$ENTRY_TOKEN\" from machine-id"
+    log_verbose "No entry-token candidate matched, using \"$ENTRY_TOKEN\" from machine-id"
 fi
 
 if [ -z "$layout" ]; then
@@ -266,8 +264,7 @@ if [ -z "$layout" ]; then
             # have no idea what that means, let's stay away from it by default.
             layout="other"
         fi
-        [ "$KERNEL_INSTALL_VERBOSE" -gt 0 ] && \
-            echo "$BOOT_ROOT/loader/entries.srel with '$ENTRIES_SREL' found, using layout=$layout"
+        log_verbose "$BOOT_ROOT/loader/entries.srel with '$ENTRIES_SREL' found, using layout=$layout"
 
     elif [ -d "$BOOT_ROOT/$ENTRY_TOKEN" ]; then
         # If the metadata in $BOOT_ROOT doesn't tell us anything, then check if