initramfs: Fix the removal of GPU drivers from the minimal initrd

Thanks to the great report from Saurabh Charde, we noticed that the
removal command used in the minimal initrd creation for deleting the
GPU/DRM drivers wasn't working. Fix that so now GPU drivers aren't
included for real (both for space and boot "issue-prone" criteria).

Closes: https://gitlab.freedesktop.org/gpiccoli/kdumpst/-/issues/19
Reported-by: Saurabh Charde (@schardev)
Signed-off-by: Guilherme G. Piccoli <gpiccoli@igalia.com>

initramfs/initcpio/kdump.install.in

@@ -35,9 +35,10 @@ build() {
 
     #  Finally, we shouldn't have DRM/GPU drivers and firmwares here,
     #  but...just in case, let's remove all of that nevertheless.
-    #  Our list includes the most common FWs/drivers (amd, i915, nvidia).
-    rm -rf "${BUILDROOT}"/usr/lib/firmware/{amdgpu,i915,nvidia,radeon}
-    rm -rf "${BUILDROOT}"/usr/lib/modules/*/kernel/drivers/gpu/drm/{amd,i915,nouveau,radeon}
+    #  Our list includes the most common GFX FW blobs (AMD, i915, Nvidia)
+    #  and all GPU/DRM drivers.
+    rm -rf "${BUILDROOT}"/usr/lib/firmware/{amdgpu,i915,nvidia,radeon}/
+    rm -rf "${BUILDROOT}"/usr/lib/modules/*/kernel/drivers/gpu/drm/*
 
     add_runscript
 }