samsung-herolte: fix indent in nonfree_firmware (!478)

As spaces instead of tabs were used, pmbootstrap would error out when
using `samsung-herolte` during init.

device/device-samsung-herolte/APKBUILD

@@ -2,7 +2,7 @@
 pkgname="device-samsung-herolte"
 pkgdesc="Samsung Galaxy S7"
 pkgver=0.1
-pkgrel=1
+pkgrel=2
 url="https://postmarketos.org"
 license="MIT"
 arch="aarch64"
@@ -23,9 +23,9 @@ package() {
 }
 
 nonfree_firmware() {
-    pkgdesc="Non-free firmware for the Samsung Galaxy S7"
-    depends="firmware-samsung-hero"
-    mkdir "$subpkgdir"
+	pkgdesc="Non-free firmware for the Samsung Galaxy S7"
+	depends="firmware-samsung-hero"
+	mkdir "$subpkgdir"
 }
 
 sha512sums="c273794d0f9b16f14020d8165ec8413ee243511743e9c48c3245cc7390419889c8e8b6ffef2e066b5b1f97fb473848da22990ba067293e8b22caaad537b9067a  deviceinfo