device-lg-hammerhead: use lk2nd-msm8974-lge-hammerhead

device/testing/device-lg-hammerhead/APKBUILD

 # Reference: <https://postmarketos.org/devicepkg>
 pkgname=device-lg-hammerhead
 pkgver=7
-pkgrel=1
+pkgrel=2
 pkgdesc="Google Nexus 5"
 url="https://postmarketos.org"
 arch="armv7"
 license="MIT"
 depends="
 	linux-postmarketos-qcom-msm8974
-	lk2nd-msm8974
+	lk2nd-msm8974-lge-hammerhead
 	mkbootimg
 	postmarketos-base
 	swclock-offset