device-samsung-j7eltetmo: avoid overriding udev v4l rule in /etc (MR 4768)

Depend on postmarketos-base-downstream-disable-udev-v4l instead, which
symlinks /lib/udev/rules.d/60-persistent-v4l.rules to /dev/null.

device/testing/device-samsung-j7eltetmo/APKBUILD

@@ -2,7 +2,7 @@
 pkgname=device-samsung-j7eltetmo
 pkgdesc="Samsung Galaxy J7 (T-Mobile)"
 pkgver=0.1
-pkgrel=4
+pkgrel=5
 url="https://postmarketos.org"
 license="MIT"
 arch="aarch64"
@@ -12,6 +12,7 @@ depends="
 	mkbootimg
 	msm-fb-refresher
 	postmarketos-base
+	postmarketos-base-downstream-disable-udev-v4l
 "
 makedepends="devicepkg-dev"
 source="
@@ -24,10 +25,6 @@ build() {
 
 package() {
 	devicepkg_package $startdir $pkgname
-	# Disable v4l udev rules, because if enabled the device will fail to boot
-	# when VIDEO_EXYNOS_FIMC_IS is enabled.
-	mkdir -p "$pkgdir"/etc/udev/rules.d
-	ln -s /dev/null "$pkgdir"/etc/udev/rules.d/60-persistent-v4l.rules
 }