test: skip defconfig backup files at find time, not mid-loop

defconfig.sh used $# (find result, incl. *~ / *.bak) for the TAP total
but then 'continue'd past backups without decrementing — so a stray
bpi_r4_*_defconfig~ in the tree made TAP see "1..23" followed by only 21
results, and the harness treated the missing 2 as failures.  Filter the
patterns at find instead; $# now matches what the loop iterates over

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>

test/case/repo/defconfig.sh

@@ -31,12 +31,6 @@ check()
 
     echo "1..$total"
     for defconfig in "$@"; do
-	# Skip UNIX backup files
-	case "$defconfig" in
-	    *~|*.bak|'#'*'#'|.#*)
-		continue
-		;;
-	esac
 	base=$(basename "$defconfig")
 	if whitelist "$base"; then
 		echo "ok $num - $base is exempted # skip"
@@ -50,6 +44,9 @@ check()
 }
 
 # shellcheck disable=SC2046
-check $(find "$CONFIGS" -maxdepth 1 -type f | LC_ALL=C sort) || exit 1
+check $(find "$CONFIGS" -maxdepth 1 -type f \
+	     ! -name '*~' ! -name '*.bak' \
+	     ! -name '#*#' ! -name '.#*' \
+	     | LC_ALL=C sort) || exit 1
 
 exit 0