main/lk2nd: armv7 only on msm8226 and msm8974 (MR 3936)

msm8226 and msm8974 are both arm32 SoCs.
Set the architecture to armv7 only.

Fixes #1900
[ci:skip-build]: already built successfully in CI

main/lk2nd/APKBUILD

@@ -17,13 +17,18 @@ options="!check !archcheck !tracedeps !strip pmb:cross-native"
 # * stripping of unused sections is done in lk2nd's own ld script.
 
 subpackages="
-	$pkgname-msm8226
-	$pkgname-msm8226-appended:msm8226_appended
 	$pkgname-msm8916
 	$pkgname-msm8916-appended:msm8916_appended
-	$pkgname-msm8974
 "
 
+if [ "$CARCH" = "armv7" ]; then
+	subpackages="
+		$subpackages
+		$pkgname-msm8226
+		$pkgname-msm8226-appended:msm8226_appended
+		$pkgname-msm8974"
+fi
+
 build() {
 	# This builds baremetal executable; distro-specific compiler flags
 	#   and optimizations can't be set by build system.
@@ -41,8 +46,10 @@ build() {
 	export PATH=/usr/sbin:/usr/bin:/sbin:/bin
 
 	make LK2ND_VERSION="$pkgver-r$pkgrel-postmarketos" TOOLCHAIN_PREFIX=arm-none-eabi- lk2nd-msm8916
-	make LK2ND_VERSION="$pkgver-r$pkgrel-postmarketos" TOOLCHAIN_PREFIX=arm-none-eabi- lk2nd-msm8974
-	make LK2ND_VERSION="$pkgver-r$pkgrel-postmarketos" TOOLCHAIN_PREFIX=arm-none-eabi- lk2nd-msm8226
+	if [ "$CARCH" = "armv7" ]; then
+		make LK2ND_VERSION="$pkgver-r$pkgrel-postmarketos" TOOLCHAIN_PREFIX=arm-none-eabi- lk2nd-msm8974
+		make LK2ND_VERSION="$pkgver-r$pkgrel-postmarketos" TOOLCHAIN_PREFIX=arm-none-eabi- lk2nd-msm8226
+	fi
 }
 
 package() {