oem-intel: add i915 DMC fw to initramfs (MR 5237)

Intel >=gen9 GPUs require DMC firmware to support some runtime low power
states, it's loaded when i915 starts so let's make sure it's in the
initramfs.

Also see: https://www.kernel.org/doc/html/latest/gpu/i915.html#dmc-firmware-support

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

device/community/oem-intel/00-oem-intel-i915-firmware.files

@@ -0,0 +1,2 @@
+# DMC fw is required on newer GPUs to enable lower power states
+/lib/firmware/i915/*_dmc*

device/community/oem-intel/APKBUILD

@@ -1,8 +1,8 @@
 # Maintainer: Clayton Craft <clayton@craftyguy.net>
 pkgname=oem-intel
 pkgdesc="Intel device support"
-pkgver=3
-pkgrel=1
+pkgver=4
+pkgrel=0
 url="https://postmarketos.org"
 license="MIT"
 arch="x86_64"
@@ -18,11 +18,16 @@ subpackages="
 	$pkgname-libva
 	$pkgname-vulkan
 "
-source="00-oem-intel.modules"
+source="
+	00-oem-intel.modules
+	00-oem-intel-i915-firmware.files
+	"
 
 package() {
 	install -Dm644 00-oem-intel.modules \
 		-t "$pkgdir"/usr/share/mkinitfs/modules
+	install -Dm644 00-oem-intel-i915-firmware.files \
+		-t "$pkgdir"/usr/share/mkinitfs/files
 }
 
 libva() {
@@ -43,4 +48,5 @@ vulkan() {
 
 sha512sums="
 48b8c0454c8c80e7ad0ebd139c01790eed3fbd4265bf4ce64882d354b091ac7f63084eaf2b00d1244a7a692c73fa900193724577f9a8d753fa8b6743fe1c8990  00-oem-intel.modules
+c17f5c505e0e280a9e51ac1b4264e7703b744fd3831d75ce95f41be4755ae4ccd24b7ca09ba1e236df499a5e748c64a0d2054c9d55d8c8c713fa8c5646ed9a3c  00-oem-intel-i915-firmware.files
 "